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  • Tools to backup an external hard disk

    - by Kaushik Gopal
    Hey people, What's the best method to take an exact copy of my external hard disk? A guru suggested rsync, but I was wondering if there's an easier alternative. I do remember reading somewhere that Acronis also does this. Was looking for your advice on the best option. I'm running Windows. Essentially i have an external HDD which has a lot of stuff synchronized across various pcs. I wish to take a backup of this external Hard disk (ext.HDDs aren't entirely reliable so want to keep a backup of my ext.HDD). Cheers. K

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  • insert system disk error after switchting SATA cables

    - by Matthias
    I have 5 hard disks built in my computer, two connected by IDE cables, three by SATA. Today I had to return two of the SATA cables to my room mate. So I grabbed another one I had floating around and connected the remaining disk by unplugging my DVD R/W. Now I receive the 'insert system disk and press enter' error after booting. Disks and cables seem to be fine, since all the disks are recognized in the BIOS. Also, I can mount the disks using a live CD w/o problems. I also tried different orderings of the cables (i.e. plugging the disks in different plugs on the mainboard), I'm not sure if that even matters using SATA. Any Ideas what might be the problem here? The OS installed are Windows 7 and Ubuntu 10, the bootloader installed is GRUB. PS: No RAID involved, JBOD.

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  • WebClient/Publisher Temporary Files in CleanMgr(Disk Cleanup)

    - by MsLis
    When I run Disk Cleanup (cleanmgr.exe) on my work PC (running WinXP), it claims to see 778,520 K of WebClient/Publisher Temporary Files Although I do check that field, the number never drops. I've manually scanned through all possible temp folders on the drive and don't see anyplace hiding 760 MB of temp files, which makes me wonder whether those files merely exist in some list (registry or INI) somewhere but don't actually exist on the drive. So, my questions are: 1. Where on the drive might those WebClient/Publisher Temporary Files be 2. Where does cleanmgr.exe look to determine how much disk space is used by WebClient/Publisher Temporary Files Thanks in advance.

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  • Debian tuning for increasing read/write buffer.

    - by Claudiu
    Is there a way to modify Debian settings so the memory could be used more for disk read/write caching ? I am already using RAID 0 but thats not enough for multiple users, and the disk is almost struggled. Torrents use the disk very much and rTorrent doesn't have cache settings.

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  • Boot linux off hard drive and then switch to run from usb flash disk

    - by Jesse
    I have an older laptop that I want to use as a simple media server on my home network. I would like to avoid using the internal hard drive except for booting (BIOS does NOT support booting from USB). My thought was to mirror the hard drive (currently has current install of Arch Linux) onto the flash drive and then after booting switch over to run everything from the flash drive. I read the following article about using a RAM disk (HOW-TO: Boot OS into RAM for speed and silence) but ran into problem because the USB subsystem does not seem to be initialized soon enough (I create root and home paritions on the flash disk and modified fstab to pick those - didn't work). Any thoughts?

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  • Creating GPT partitions on EFI raw disk using diskpart

    - by kafka
    I've got a raw, blank GPT disk for use in a UEFI system. I need to create the partitions on it using diskpart. The only tutorial I've found so far is for diskpart.efi, which I believe is slightly different from the command-line diskpart. MS guide to GPT partitions with diskpart.efi Also the guide says to create a MSR of 32MB, but for a disk= 16GB I know it needs to be 128MB. I'm happy doing it with diskpart, just want to be sure I understand the fundamentals. I'm planning on installing, in this order: ESP partition, size 102 MB (create partition esp size=102) MSR partition, size 128 MB (create partition msr size=128) data partition, the remaining space (approx 460GB) Is this the correct thing to do, or is there anything I'm missing?

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  • Very slow disk performance on Dell PowerEdge 2950 w/ PERC 6/i running RAID 10

    - by vocoder
    I recently set up a server running Ubuntu 10.04 LTS on a Dell PowerEdge 2950 server - it has 6 500 gb 7200RPM SATA drives setup in a RAID 10 config. I am seeing extremely poor disk performance - the RAID array reports all disks are normal and using MegaCLI, it looks like the BBU is fine. hdparm -tT /dev/sda reports: Timing cached reads: 90 MB in 2.05 seconds = 43.96 MB/sec Timing buffered disk reads: 24 MB in 3.11 seconds = 7.72 MB/sec So as you can see, it takes forever to something as simple as an apt-get upgrade and even logging into the server. How do I go about troubleshooting what is causing this? I upgraded the firmware on the PERC 6i RAID controller to the latest, but didn't see any improvements.

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  • Diffie-Hellman -- Primitive root mod n -- cryptography question.

    - by somewhat confused
    In the below snippet, please explain starting with the first "for" loop what is happening and why. Why is 0 added, why is 1 added in the second loop. What is going on in the "if" statement under bigi. Finally explain the modPow method. Thank you in advance for meaningful replies. public static boolean isPrimitive(BigInteger m, BigInteger n) { BigInteger bigi, vectorint; Vector<BigInteger> v = new Vector<BigInteger>(m.intValue()); int i; for (i=0;i<m.intValue();i++) v.add(new BigInteger("0")); for (i=1;i<m.intValue();i++) { bigi = new BigInteger("" + i); if (m.gcd(bigi).intValue() == 1) v.setElementAt(new BigInteger("1"), n.modPow(bigi,m).intValue()); } for (i=0;i<m.intValue();i++) { bigi = new BigInteger("" + i); if (m.gcd(bigi).intValue() == 1) { vectorint = v.elementAt(bigi.intValue()); if ( vectorint.intValue() == 0) i = m.intValue() + 1; } } if (i == m.intValue() + 2) return false; else return true; }

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  • How to configure nginx to serve static contents from RAM?

    - by Vijayendra Tripathi
    I want to set up nginx as my web server. I want to have image files cached in the memory (RAM) rather then disk. I am serving a small page and want few images always served from RAM. I dont wish to use varnish (or any other such tools) for this as I believe nginx has a capability to cache contents into RAM. I am not sure as how may I configure nginx for this? I did try few combinations but they didn't work. nginx uses disk all the time to get images. For example, when I tried apache benchmark to test with following command - ab -c 500 -n 1000 http://localhost/banner.jpg I get following error - socket: Too many open files (24) I guess this means nginx is trying to open to many files simultaneously from the disk and OS is not allowing this operation. Can anyone please suggest me a correct configuration? Thanks for considering this message.

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  • XEN disk mapping problem under opensolaris

    - by Louis
    I have a system with two harddisks, i wanted to use the simplicity of ZFS for my file server and i also need to run a linux. I choosed XEN virtualization for that, supported on both system. My GRUB is well configured and i can boot both system. I would like is to run both system with solaris as a dom0 and the debian installed on the 2nd HD as a virtual machine. My problem is that i want to use the partitions of my 1st harddisk (sda1 under linux) and it does not work. I didn't find my use case on the web- Here is my Opensolaris device name of this partition : /dev/rdsk/c7d0p1 But when i use : disk = [ 'phy:rdsk/c7d0p1,sda1,w' ] as a disk mapping in my XEN configuration file i have the error : Error: Device 2049 (vbd) could not be connected. error: "rdsk/c7d0p1" is not a valid block device. I am "lost".

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  • Resetting Mac OS X administrator password without a disk

    - by Simon Sheehan
    I'm currently in possession of an eMac G4 running OS X 10.4. I went to install some software, and found I didn't actually have the password. No one seems to know it, and it's not written down anywhere. These were purchased by the school many years ago and are not really maintained, since people just used Garageband mostly. I went to look for the restore disk, and its nowhere to be found. How can I reset the password without a disk?

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  • Producer / Consumer - I/O Disk

    - by Pedro Magalhaes
    Hi, I have a compressed file in the disk, that a partitioned in blocks. I read a block from disk decompress it to memory and the read the data. It is possible to create a producer/consumer, one thread that recovers compacted blocks from disk and put in a queue and another thread that decompress and read the data? Will the performance be better? Thanks!

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  • HP ProBook 4540s CD/DVD Drive cannot Read Disks

    - by DavidB
    I seem to have a problem with the CD/DVD drive on my HP ProBook 4540s laptop. I cannot get it to read any disks. Normally, I would say that this is a hardware issue, but whenever I put a disk that previously could be read in the drive, it starts to make noise like it is trying to to read the disk but cannot and AnyDVD HD seems to be able to retrieve disk information with some struggle. Any ideas on what the problem could be?

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  • Strip my windows NTFS disk of all ACLs

    - by Alain Pannetier
    When you purchase a windows PC nowadays, you don't actually "own" the whole disk... There are so many ACLs on each folder that there are portions of it you actually can access only through a complex sequence of actions requiring skills well beyond the average PC user. You have to drill down to deeply buried dialog boxes accessible through concealed buttons. You have to understand at which level of the hierarchy you have to take ownership, remove ACLs etc... Yet when you think of it, that's your PC, that's what the "P" of PC originally stand for... So I'm toying with the idea of just stripping the disk of all ACLs I just purchased and leave standard file protections do the basic protection work... Just like previous century Windows used to do... (before I chmod -R 777 ;-) Has anybody done that already and nevertheless survived in reasonably good shape for a reasonable amount of time ? Any technical advice to do that ? Powershell script ? basic script using iCACLS ?

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  • When and Where does Wubi mount it's virtual disks

    - by TuxPotato
    My use of the wubi-new-virtual-disk made Wubi start mounting this new virtual home disk over my /home folder. After the use of the script failed, I am left with Wubi constantly remounting an empty virtual disk over my /home folder. I followed the instructions on the Ubuntu website to revert the change, but the mounting continues. Where did Wubi put the mount operation, and how can I remove it? Thanks in advance!

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  • Apache mod-vhost-alias question

    - by Kyle
    Hello! I was wondering if you could use a wildcard in the VirtualDocumentRoot directive. I mean is it possible to scan multiple directories with the VirtualDocumentRoot, like multiple home directories to look for sites?

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  • Backup and rescue disk creation

    - by Polppan
    I am in the process of backing up my PC using "Macrium backup and restore". I have successfully backed my PC, (both C and D drive) to an external hard disk. I have a question regarding creating rescue disks. I am following the steps as mentioned in this document. If I am creating an ISO file based on the document, how it is relates to the backup I have taken to my external disk ? I see no relation between creating rescue disks and backup data or am I missing something obvious? Any insight will be highly appreciable...

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  • Complete Apple Powerbook G4 format without disk

    - by Sam
    I have gone through many sites to look for the exact answer. However I failed. What I want: To completely format my Powerbook G4 to factory or brand new without any DVD/CD or Disk/Disc I am not worried about ethical or un-ethical way. I just need to format the entire Powerbook G4 to factory setting WITHOUT ANY DVD/CD/DISC/DISK so that It’s a brand new one. I am ready to do anything, but please don’t advice me on buying or download the MAC OS 10.5 Leopard from torrent or blah blah.

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  • prevent OS X from prompting disk initialization/formatting

    - by Just-A-User.A-Superuser
    i have TrueCrypt partition, when i insert it in OS X, it always prompt me to initialize the hard disk. is there a way to prevent os x from detecting uninitialize hard disk? [UPDATE] by the way, as Truecrypt suggested while i'm in Windows, i must make partitions so the os won't detect the hard drive as uninitialized. Windows respected that the drive already have contents by the mere fact that it has partitions, while OS X thinks that it is still uninitialized. i think OS X is trying to be smart by detecting if each partition has a valid filesystem id/marker

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  • script Disk Management configuration

    - by Joseph
    I have 10 workstations with large monitors that have USB slots and several card readers built in. The card readers cannot be disabled and will map to drive letters when I image the computers. I go into Disk Management and delete the drive mappings and add mappings to a single folder in C:\ with a folder for each slot. I have to do this because of scripts that run that are expecting specific letter drive mappings to network resources. Is there a way to script the deleting and adding of drive mappings instead of having to use the Disk Management GUI manually on each workstation? The workstations are running XP Professional.

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  • PHP - Large Interger mod calculation

    - by Kami
    I need to calculate modulus with large number like : <?php $largenum = 95635000009453274121700; echo $largenum % 97; ?> It's not working... beacause $largenum is too big for an int in PHP. Any idea how to do this ?

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