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• 4K sectors: Why are hard drives moving to 4096 byte sectors, vs. 512 byte sectors? Are 4K sectors a

  - by Chris W. Rea

  I've noticed that some Western Digital hard drives are now sporting 4K sectors, that is, the sectors are larger: 4096 bytes vs. the actual de facto standard of 512 bytes. So: What's the big deal with 4K sectors? Is it marketing hype, or a real advantage? Why should somebody building a new PC care, or not, about 4K sectors? Why is this transition taking place now? Why didn't it happen sooner? Are there things to look out for when buying a 4K sector hard drive? e.g. incompatibility? Anything else we should know about 4K sectors?

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• Hard Disk Not Counting Reallocated Sectors

  - by MetaNova

  I have a drive that is reporting that the current pending sectors is "45". I have used badblocks to identify the sectors and I have been trying to write zeros to them with dd. From what I understand, when I attempt writing data directly to the bad sectors, it should trigger a reallocation, reducing current pending sectors by one and increasing the reallocated sector count. However, on this disk both Reallocated_Sector_Ct and Reallocated_Event_Count raw values are 0, and dd fails with I/O errors when I attempt to write zeros to the bad sectors. dd works fine, however, when I write to a good sector. # dd if=/dev/zero of=/dev/sdb bs=512 count=1 seek=217152 dd: error writing ‘/dev/sdb’: Input/output error Does this mean that my drive, in some way, has no spare sectors to be used for reallocation? Is my drive just in general a terrible person? (The drive isn't actually mine, I'm helping a friend out. They might have just gotten a cheap drive or something.) In case it is relevant, here is the output of smartctl -i : Model Family: Western Digital Caviar Green (AF) Device Model: WDC WD15EARS-00Z5B1 Serial Number: WD-WMAVU3027748 LU WWN Device Id: 5 0014ee 25998d213 Firmware Version: 80.00A80 User Capacity: 1,500,301,910,016 bytes [1.50 TB] Sector Size: 512 bytes logical/physical Device is: In smartctl database [for details use: -P show] ATA Version is: ATA8-ACS (minor revision not indicated) SATA Version is: SATA 2.6, 3.0 Gb/s Local Time is: Fri Oct 18 17:47:29 2013 CDT SMART support is: Available - device has SMART capability. SMART support is: Enabled UPDATE: I have run shred on the disk, which has caused Current_Pending_Sector to go to zero. However, Reallocated_Sector_Ct and Reallocated_Event_Count are still zero, and dd is now able to write data to the sectors it was previously unable to. This leads me with several other questions: Why aren't the reallocations being recored by the disk? I'm assuming the reallocation took place as I can now write data directly to the sector and couldn't before. Why did shred cause reallocation and not dd? Does the fact that shred writes random data instead of just zeros make a difference?

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• 4K sectors transition: Why are hard drives moving to 4096 byte sectors, vs. 512 byte sectors?

  - by Chris W. Rea

  I've noticed that some Western Digital hard drives are now sporting 4K sectors, that is, the sectors are larger: 4096 bytes vs. the long-standing standard of 512 bytes. So: What's the big deal with 4K sectors? Is it marketing hype, or a real advantage? Why should somebody building a new PC care, or not, about 4K sectors? Why is this transition taking place now? Why didn't it happen sooner? Are there things to look out for when buying a 4K sector hard drive? e.g. incompatibility? Anything else we should know about 4K sectors?

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• What is the deal with hard drive technology moving to 4K sectors, vs. 512 bytes? Are 4K sector disk

  - by Chris W. Rea

  I've noticed that some Western Digital hard drives are now sporting 4K sectors, that is, the sectors are larger: 4096 bytes vs. the actual de facto standard of 512 bytes. So: What's the big deal with 4K sectors? Is it marketing hype, or a real advantage? Why should somebody building a new PC care, or not, about 4K sectors? Why is this transition taking place now? Why didn't it happen sooner? Are there things to look out for when buying a 4K sector hard drive? e.g. incompatibility? Anything else we should know about 4K sectors?

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• Why are hard drives moving to 4096 byte sectors, vs. 512 byte sectors?

  - by Chris W. Rea

  I've noticed that some Western Digital hard drives are now sporting 4K sectors, that is, the sectors are larger: 4096 bytes vs. the long-standing standard of 512 bytes. So: What's the big deal with 4K sectors? Is it marketing hype, or a real advantage? Why should somebody building a new PC care, or not, about 4K sectors? Why is this transition taking place now? Why didn't it happen sooner? Are there things to look out for when buying a 4K sector hard drive? e.g. incompatibility? Anything else we should know about 4K sectors?

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• HDD bad sectors with OS

  - by Michael Z

  I wonder is that possible for OS to make bad sectors on Hard Drive? Preface: I have bought new HDD on 1Tb WB Caviar Black. I have installed new OS on ext4 partition Ubuntu 12.04.1 LTS. After few days S.M.A.R.T. of the Ubuntu's Disk Utility show that my hard has bad sectors! I have checked on S.M.A.R.T. immediately after installing OS - all was OK. During new OS working I have noticed some strange with HDD - all OS was freezed from 20 sec to 1 min and I have heard like HDD's engine restarting. At the dmes I have found something like this: [40085.407947] ata1.00: device reported invalid CHS sector 0

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• S.M.A.R.T. broken sectors

  - by Jeffrey Vandenborne

  Recently I received my hard drive (LaCie) that I've sent away for warranty, my disk failed, and I used Palimpsest Disk utility to check if anything was wrong in the S.M.A.R.T Status. And it said that there were a few broken sectors. So the next day, I went to the store and told the story. 4 weeks later I actually got my drive back. The first thing I did was plugging it in and starting the disk utility, and weirdly it showed me pretty much the exact same things, even the values of most tests were the same as they were before when my drive broke. The serial number is different though, but it does show a very peculiar value. Now I'm wondering, I'm almost sure it's the exact same drive and it still says I've got broken sectors, does it just say that because it has been cached in the drive somewhere while LaCie DID actually fix it? Or should I run the extended self test (which seems to take hours) first? Also I've tried the smartctl command tool, it says the drive has smart support, but it doesn't show anything, it says that it's enabled, but then it says that it's disabled, picture below The picture of the Disk utility: Thanks in advance

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• Clone a 2TB WD Green internal drive with bad sectors to a 3TB partitioned external

  - by ron

  I have a 2TB WD Black drive and would like to simply do a straight clone from a failing 3TB drive to it. Both are SATA. Will I be able to just install the new drive alongside the faulty one and then do the clone/rescue attempt with ddrescue or is there a better method? The faulty internal drive mentioned has bed sectors although am usually able to boot into Windows 7 Ultimate with it and navigate and access all my programs. I have been attempting some trials with an Ubuntu Live CD using ddrescue but am not sure I'm doing it right. I have a 3TB WD my book essential external which is GPT and have created a separate 2TB partition on it which I am trying to clone to. I assume I need to format the new drive first to NTFS? Can I do that via the Ubuntu Rescue Remix 12-04 live DVD that I've been booting with?

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• Pathfinding with MicroPather : costs calculations with sectors and portals

  - by Adan

  Hello, I'm considering using micropather to help me with pathfinding. I'm not using a discrete map : I'm working in 2d with sectors and portales. However, I'm just wondering what is the best way to compute costs with this library in this context. Just to be more clear about geometrical shapes I'm using : sectors are basically convex polygons, and portals are segments that lies on sector's edge. Micropather exposes a pure virtual Graph class that you must inherate and overrides 3 functions. I understand how pathfinding works, so there's no problem in overriding those functions. Right now, my implementation give me results, i.e I'm able to find a path in my map, but I'm not sure I'm using an optimal solution. For the AdjacentCost method : I just take the distance between sector's centers as the cost. I think a better solution should be to use the portal between the two sectors, compute its center, and then the cost should be : distance( sector A center, portal center ) + distance ( sector B center, portal center ). I'm pretty sure the approximation I'm using with just sector's center is enough for most cases, but maybe with thin and long sectors that are perpendicular, this approximation could mislead the A* algorithm. For the LeastCostEstimate method : I just take the midpoint of the two sectors. So, as you understand, I'm always working with sectors' centers, and it's working fine. And I'm pretty sure there's a better way to work. Any suggestions or feedbacks? Thanks in advance!

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• will reformatting my hard drive fix bad sectors on it?

  - by devilHeroe

  will reformatting my hard drive fix bad sectors on it? assuming im not concerned with the data on it....

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• How to force a remap of sectors reported in S.M.A.R.T C5 (Current Pending Sector Count)?

  - by edgh

  The S.M.A.R.T C5 value of my Samsung HM640JJ Hard Drive (in an HP Pavilion dv6 laptop) is "yellow status = caution" C5 was 10 yesterday, and it's 21 today. C4 (Reallocation Event Count) = 0 and 05 (Reallocated Sectors Count) = 0 How can I force the firmware to reallocate them? I removed the partitions, recreated them again and formatted the entire drive. I ran chkdsk /r /f I ran the BIOS disk check utility and other diagnose/repair tools

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• Recover files from NTFS drive with bad sectors

  - by Martin

  A few nights ago I have created a backup of my data on an external 500 GB NTFS USB hard drive. I have then formatted my computer, reinstalled Ubuntu and started transferring back the data from the external HDD. Unfortunately some files have became corrupted and Ubuntu is unable to copy them over. The same issue happens if I login using Windows 7. Disk Utility detects with SMART that there are "a few bad sectors". Some of files are perfectly intact, but other files cannot be accessed (nor read, copied...) although they are displayed within nautilus and show the correct file size. Is there anything I can do to recover this data? I have thought of using TestDisk but this utility seems more useful for repairing lost partitions or deleted files. I have also thought of using ddrescue so I could at least have a low level copy of the disk but I am not sure what use to make of it in order to recover the data!!!

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• hard drive sectors vs. tracks

  - by Phenom

  In one rotation, how many sectors are passed over and how many tracks are passed over? If you know the average value of sectors per track for a hard drive, how do you use this to estimate the number of cylinders? Do all modern hard drives have 63 sectors per track? Are there any hard drives that have more than this?

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• External USB Drive

  - by ErocM

  I have a server that I hooked up an external USB drive. It was formatted in windows and has files on it already. I'm new to Ubuntu so please be patient... I have two questions: Will Ubuntu see the drive since it was formatted in windows? How do I mount this drive or rather, how do I know it's seen by Ubuntu? Thanks! I did fdisk -l and this is what I have but I don't see it. It's a 1tb drive: Disk /dev/sda: 320.1 GB, 320072933376 bytes 255 heads, 63 sectors/track, 38913 cylinders, total 625142448 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0001eb47 Device Boot Start End Blocks Id System /dev/sda1 * 2048 499711 248832 83 Linux /dev/sda2 501758 625141759 312320001 5 Extended /dev/sda5 501760 625141759 312320000 8e Linux LVM Disk /dev/sdc: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdc doesn't contain a valid partition table Disk /dev/sdb: 160.0 GB, 160041885696 bytes 255 heads, 63 sectors/track, 19457 cylinders, total 312581808 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/sdb doesn't contain a valid partition table Disk /dev/mapper/ubuntu-root: 316.6 GB, 316577677312 bytes 255 heads, 63 sectors/track, 38488 cylinders, total 618315776 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/ubuntu-root doesn't contain a valid partition table Disk /dev/mapper/ubuntu-swap_1: 3217 MB, 3217031168 bytes 255 heads, 63 sectors/track, 391 cylinders, total 6283264 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 this is an external USB hard drive not a thumb drive :)

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• scan partition for bad blocks

  - by user22559

  Hello everyone I have a hard disk with bad sectors on it. I want to partition the drive so that the partitions are in the good part of the hard disk, and the parts that have bad sectors are not used. The first ~20GB of the hard disk are good. Then comes a ~13GB part that is riddled with bad sectors. After that, the hard disk is good again, but at the very end there is a ~2GB part with bad sectors. I have used an app called "Hdtune" to get this information, and I have created a 19GB c: partition at the beginning of the drive, then skipping the 13GB of bad sectors, then creating the D: partition that spans the rest of the disk, minus the last 2GB. The C: partition works well (i have been using it for a month and i have got no error whatsoever), but the D partition has been giving me problems. Somehow, it seems that I have some bad sectors in the D: partition. I am looking for an app that scans the HDD, finds the bad blocks, and shows them in a map so I can see if they are in the D partition. Or, an app that scans only a specified partition for bad sectors, and then shows in a map where the bad sectors are in the partition. I want to know this so I can resize the D partition so that it is outside of the bad area of the disk.

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• How can I wipe my iPod classic and fix any bad sectors on the hard drive without killing it?

  - by Sam Meldrum

  My iPod never finishes syncing and only syncs audio, not pictures or video. Any ideas as to how I can fix it? My iPod classic 160GB worked well for a couple of years. I used to sync a lot of photos at full resolution to it, but this recently stopped working after I moved to Windows 7. iTunes is on latest version - 9.1.1.12 iPod software is up to date - 1.1.2 Windows 7 is fully up to date and patched The symptoms are that the iPod will start to sync, all audio (music and podcasts will sync successfully) but the syncing will then just appear to continue - itunes message: Syncing iPod. Do not Disconnect. This sync never completes - I have left it trying for days. I have tried resetting the iPod using the Restore button, whereupon it restarts sync from default options and again will sync audio, but nothing else. I suspect that something has gone wrong on the hard-drive - either a bad sector or some corrupt data. Is there a process I can go through to fix this? E.g. SpinRite or a format? If so how do I go about formatting an iPod and will it be recognised as an iPod after format and work as normal? Any advice on what to try next much appreciated? Update I have eliminated problems with the files, PC or iTunes as they sync fine to other iPods. I have also eliminated the cable by trying different cables which work with other iPods. What I'd really like to know is if there is any way to more fundamentally wipe the iPod safely, attempt to repair any bad sectors on the hard drive and then start from scratch. Anyone ever managed this?

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• System randomly freezes yet mouse still moves, SSD out of reallocatable sectors, should I replace it?

  - by user784446

  This problem has lasted for the past 48 hours. The first time it happened, a program I was running stopped responding, so I tried to end it from task manager. The processes at first were listed fine until hovered upon. Eventually, despite the mouse still being able to move, after a few persisting clicks the mouse finally stopped moving. The screen went blank shortly thereafter. The second time it occurred, items on the screen stopped responding - hovering over the taskbar or such wouldn't elicit a response. Sound would still play however. Eventually, the mouse became unresponsive and the system restarted itself. I suspect that it may be a problem of my SSD drive. After looking through some Google search results, I downloaded HDTunePro to determine if there's a problem with the drive. Results returned a problem of reallocated sector count. An error scan also revealed 48 bad sectors. Also, an attempt to backup the contents of the most important areas of the drive returned a few explorer "Error: cannot read source from disk" errors. Should I ditch the drive and use another drive or is there anything that can be done to repair the drive? SSD: OCZ Petrol 64gb CPU: AMD Athlon II X4 640 RAM: Generic 3GB DDR2 Motherboard: Gigabyte MA74GM-S2H OS: Windows 7 Ultimate x64 Thanks!

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• Avoid read-write access to bad sectors on HDD to continue working on the HDD

  - by goldenmean

  I have a HP Pavilion dv6446 notebook. It had Windows Vista Home premium. After 4.5+ years of usage, just recently it started malfunctioning. While working fine, its screen goes white or sometimes some thin black lines horizontally. Laptop freezes. Hard reboot works. Again it works for some 2 hrs or so, same error. To diagnose I did run the Memory and Hard disk check which is present in the Bios Setup. Memory test passed. Hard disk test returned an error saying something like - "Replace the hard disk". Bad.. Some sectors or platters have gone bad on the disk. (I confirmed this later by further tests mentioned below) Then I tried installing a Ubuntu 11.10. It listed 3 partitions /dev/sda1, sda2, sda2. It again gave error and could not install grub loader on /dev/sda1. Bad sectors. Then redid the Ubuntu installation, this time asked to to install the Ubuntu on /dev/sda3. and kept /dev/sda1 for /home. Installed fine, and works fine as well. Due to unavailability of WiFi/ Ethernet driver for that adapters under Ubuntu( at least I could not configure them and get the networking working at all), I decided to go back to reinstall windows Vista. It did install fine. I did not have to format one data partition which has my data. I just formatted one partition which installed Windows So in effect HDD has not undergone a full format here. Worked ok for 1 day. But same white screen and freeze happened. Looks like while it is in use, it accesses the bad sectors for storing some data and that's when it bombs. I am inclined to think HDD has not failed fully or crashed but has developed bad sectors. Else if it was a HDD crash, it would have refused to boot at all let alone install on it. Questions: Is there any HDD test check under windows or any such tools windows/linux based ewhere which can identify the bad sectors of the HDD and 'lock/isolate' them from further read-write access of any kind. If not what are my options, if any to salvage this laptop HDD without replacing it. EDIT: Would the Disk Error checking tool under windows help in any way?

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• Ubuntu 12.04 boot degraded raid

  - by beacon_bonanza

  I've installed Ubuntu 12.04.1 in a new server and set up the 4 hard drives with 3 RAID 1 devices, the configuration is such that the first two drives have md0 (swap space) and md1 (/) with the third and fourth drives having md2 (/var). I've been testing the operation under a drive failure and found that the system boots fine if I remove disk two but if I remove disk one then the system gets to grub and then just restarts. I'm confused as to why grub appears to be loading properly from disk two but then the boot fails. I've tried to copy the MBR from disk 1 to 2: dd if=/dev/sda of=/dev/sdb bs=512 count=1 but this didn't make a difference. Any ideas how to get it to boot from just the second disk? fdisk -l Disk /dev/sda: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000ccfa5 Device Boot Start End Blocks Id System /dev/sda1 2048 31250431 15624192 fd Linux RAID autodetect /dev/sda2 * 31250432 3907028991 1937889280 fd Linux RAID autodetect Disk /dev/sdb: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000ccfa5 Device Boot Start End Blocks Id System /dev/sdb1 2048 31250431 15624192 fd Linux RAID autodetect /dev/sdb2 * 31250432 3907028991 1937889280 fd Linux RAID autodetect Disk /dev/sdd: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00035b05 Device Boot Start End Blocks Id System /dev/sdd1 2048 3907028991 1953513472 fd Linux RAID autodetect Disk /dev/sdc: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders, total 3907029168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x000c73aa Device Boot Start End Blocks Id System /dev/sdc1 2048 3907028991 1953513472 fd Linux RAID autodetect Disk /dev/md1: 1984.3 GB, 1984264208384 bytes 2 heads, 4 sectors/track, 484439504 cylinders, total 3875516032 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/md2: 2000.3 GB, 2000263380992 bytes 2 heads, 4 sectors/track, 488345552 cylinders, total 3906764416 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/md0: 16.0 GB, 15990652928 bytes 2 heads, 4 sectors/track, 3903968 cylinders, total 31231744 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000

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• Oracle BI Applications for Industry Sectors

  - by Mike.Hallett(at)Oracle-BI&EPM

  Normal 0 false false false EN-GB X-NONE X-NONE Oracle BI Applications already provide pre-built line-of-business analytic applications to over 4,000 customers: these expose the data otherwise locked inside ERP and CRM applications, giving the business user the analytics they need, and a greater ability to self-service ad-hoc queries. Now you can also take advantage of the pre-built Oracle BI Applications approach for industry sector specific analytics to streamline your client’s operations, offer better services, and increase profit margins. Find out more at http://www.oracle.com/us/solutions/business-analytics/analytic-applications/industry/overview/index.html. Retail Education Oracle Retail Merchandising Analytics Oracle Student Information Analytics Oracle Retail Customer Analytics Public Sector Financial Services Oracle Tax Analytics Oracle Financial Analytics Manufacturing Health Care Oracle Manufacturing Analytics Oracle Enterprise Healthcare Analytics Asset Intensive Oracle Clinical Development Analytics Oracle Enterprise Asset Management Analytics Oracle Operating Room Analytics Related Links Health Sciences Analytic Applications for Your Business Role Oracle Health Sciences Clinical Development Analytics Analytic Applications for Your Product Line Oracle Argus Analytics Oracle Business Intelligence Tools and Technology Communication Oracle Exalytics In-Memory Machine "The adoption of Oracle Financial Services Analytic Applications is of great significance to the bank's transition to more rigorous and risk-averse management practices."Yang Changxue, Project Manager Oracle Communications Data Model /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Table Normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-qformat:yes; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-fareast-font-family:"Times New Roman"; mso-fareast-theme-font:minor-fareast; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi;} table.MsoTableGrid {mso-style-name:"Table Grid"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-priority:59; mso-style-unhide:no; border:solid windowtext 1.0pt; mso-border-alt:solid windowtext .5pt; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-border-insideh:.5pt solid windowtext; mso-border-insidev:.5pt solid windowtext; mso-para-margin:0cm; mso-para-margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin; mso-bidi-font-family:"Times New Roman"; mso-bidi-theme-font:minor-bidi; mso-fareast-language:EN-US;}

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• Repair BAD Sectors or Buy a new HDD?

  - by Nehal J. Wani

  I have a Seagate internal hard disk drive. I recently opened up my laptop [Dell Inspiron N5010] [Warranty has expired], cleaned it and it worked normally after waking up from hibernation. However, when I restarted it, it stuck on windows loading screen, then tried to boot from Dell recovery partition but failed. It gave the error: Windows has encounter a problem communicating with a device connected to your computer. This error can be caused by unplugging a removable storage device such as an external USB drive while the device is in use, or by faulty hardware such as a hard drive or CD-ROM drive that is failing. Make sure any removable storage is properly connected and then restart your computer If you continue to receive this error message, contact the hardware manufacturer. Status: 0xc00000e9 Info: An unexpected I/O error has occurred. While cleaning, I had mistakenly touched the round silvery thing at the bottom of the HDD. I don't know whether this has caused the problem or not. Since I have Fedora also installed in the same HDD, I can boot from it but it shows weird read errors when I ask it to mount Windows partitions. The disk utility also says that the Hard Disk has many bad sectors and needs to be replaced. I downloaded Seatools from Seagate website and used it. In the long test, I gave it permission to repair the first 100 errors which it did successfully. Now I am confused at what I should do. Internal Hard Disk Costs: a. Internal HDD 500GB Costs: Rs3518 b.1 External HDD 500GB Costs: Rs3472 b.2 External HDD 1TB Costs: Rs5500 c. Internal to External Converter Costs: Rs650 I have the following options: (i) Buy an External HDD, backup my data. Try to repair bad sectors of HDD. Then two cases arise: (a) My Internal HDD gets repaired [almost] (b) My internal HDD doesn't get repaired. Then I need to buy another internal HDD and replace the damaged one. OR break the seal of the external one and put it inside my laptop as internal. Breaking the case involves risks. (ii) Buy a Internal HDD and an Internal to External Converter Case [Not very reliable], backup my data. Try to repair bad sectors of HDD. Then two cases arise: (a) My Internal HDD gets repaired [almost] (b) My internal HDD doesn't get repaired. Then I need to just put in the new internal HDD I just bought. Experts, please guide me as to what will be the most VFM option? Also, if a HDD is failing, is it that I shouldn't read from it too otherwise there is a chance of other sectors failing? What I mean is, is it wrong to read from the HDD without taking backup first?

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• How to use Hardware RAID in Ubuntu Server

  - by user2071938

  I have an Adaptec RAID-Controller and created an RAID-1(Mirroring) succesfully. Now I have installed Ubuntu Server 12.04.3. When I type fdisk -l I get this output: bf@fileserver:~$ sudo fdisk -l Disk /dev/sda: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/sda doesn't contain a valid partition table Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes 255 heads, 63 sectors/track, 121601 cylinders, total 1953525168 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/sdb doesn't contain a valid partition table Disk /dev/sdc: 80.0 GB, 80026361856 bytes 255 heads, 63 sectors/track, 9729 cylinders, total 156301488 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x0004c454 Device Boot Start End Blocks Id System /dev/sdc1 * 2048 499711 248832 83 Linux /dev/sdc2 501758 156301311 77899777 5 Extended /dev/sdc5 501760 156301311 77899776 8e Linux LVM Disk /dev/mapper/fileserver--vg-root: 75.6 GB, 75606523904 bytes 255 heads, 63 sectors/track, 9191 cylinders, total 147668992 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/fileserver--vg-root doesn't contain a valid partition table Disk /dev/mapper/ddf1_Data: 1000.1 GB, 1000065728512 bytes 255 heads, 63 sectors/track, 121584 cylinders, total 1953253376 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 4096 bytes I/O size (minimum/optimal): 4096 bytes / 4096 bytes Disk identifier: 0x00000000 Disk /dev/mapper/ddf1_Data doesn't contain a valid partition table Disk /dev/mapper/fileserver--vg-swap_1: 4160 MB, 4160749568 bytes 255 heads, 63 sectors/track, 505 cylinders, total 8126464 sectors Units = sectors of 1 * 512 = 512 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Disk /dev/mapper/fileserver--vg-swap_1 doesn't contain a valid partition table The 80 GB HDD is for the System The 1000.2 GB HDD should be for my data. But I'm a bit confused becauser there are listed two 1000.2 GB HDDs, due the Hardware RAID shoudln't there be only one HDD vissible to the OS? (I have two 1000.2 GB HDDs in an Raid-1 Array) dmraid gives me bf@fileserver:~$ sudo dmraid -r /dev/sdb: ddf1, ".ddf1_disks", GROUP, ok, 1953253376 sectors, data@ 0 /dev/sda: ddf1, ".ddf1_disks", GROUP, ok, 1953253376 sectors, data@ 0 so It seems to be ok? But how do I partitionate this disks and which one should I mount(sdb or sda?) Hope you can help me thx Florian

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• DBan not working because disk has bad sectors?

  - by canadiancreed

  Attempting to wipe the drive of a laptop that I have before it's sold, and normally use DBAN to do so. However this time it starts and then finishes instantly with the following message. "DBAN finished with non-fatal errors This is usually cause by disks with bad sectors" Have tried multiple flags such as noverify to force it to skip this check (it doesn't show bad sectors in the OS scan in windows). but the error always comes back. This is the only time that I've seen this message, as every other of the few drives I've used this software on usually take 3-5 hours to do their job.

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• how to format external hd western digital when all ntfs boot sectors are unwritable

  - by FRATZESKOS

  I WANT TO FORMAT MY EXTERNAL HARD DRIVE WHICH IS A WESTERN DIGITAL 500GB, THROUGH CMD DOS COMMAND BUT IT FAILS BECAUSE ALL NTFS BOOT SECTORS ARE UNWRITABLE. HERE ARE THE COMMANDS I GAVE AND WHAT I GOT IN RETURN! C:\Users\Stefanos&FratzeskosFORMAT F: /Q The type of the file system is RAW. The new file system is NTFS. WARNING, ALL DATA ON NON-REMOVABLE DISK DRIVE F: WILL BE LOST! Proceed with Format (Y/N)? Y QuickFormatting 476269M Volume label (32 characters, ENTER for none)? Creating file system structures. The first NTFS boot sector is unwriteable. All NTFS boot sectors are unwriteable. Cannot continue. Format failed. IS THERE SOMETHING I CAN DO TO FORMAT MY DISC?

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• sectors and clusters

  - by Phenom

  Are the sectors in a cluster all next to each other?

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