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• Why does OVFTool hang randomly?

  - by Billy ONeal

  Hello everyone :) Some great helpers here have shown me the VMWare OVF tool for template deployment. My problem is that the tool itself stops at the "Disk Transfer Completed" step half the time I use it. This seems to be random, and when it happens I have to terminate OVFTool and start the transfer over again. The second attempt usually succeeds. Is there something I have broken on the server that might affect this? I'm using the free edition of ESXi 4.0. Billy3

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• growing EBS RAID volume

  - by Ryan Fernandes

  I've created a RAID0 configuration with two 1GB EBS volumes, mounted at /dev/md0 using mdadm and formatted with XFS Next, I copied some files over to fill the volume to around 30% of its capacity (of 2GB) I then created snapshots of the volumes using ec2-consistent-snapshot and created volumes of the said snapshots but specified the volume size to be 2GB (effective doubling the capacity on each disk) I then spun up a new instance, assembled the RAID0 configuration on /dev/md0 from the 2 volumes mentioned above and mount it to /vol df -hT showed /vol as 2GB (as expected) Now I ran sudo xfs_growfs -d /vol. The command completed normally but reported blocks changed from 523776 to 524160 (only!) and df -hT still showed /vol as 2GB (instead of the expected 4GB) I rebooted, remounted, reassembled the RAID but it still reports the old size. EDIT: trying to grow the RAID using mdadm --grow yields mdadm: raid0 array /dev/md0 cannot be reshaped Is there any other way I can grow a RAID0 array?

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• Is paravirtualization evil?

  - by Daniel

  I have an VMWare ESX Server v3.5 with a few virtualized Debian Lenny VMs (kernel 2.6.22 with vmi) running Apache Tomcat 5.5. I enabled paravirtualization, and Disk IO increased from about 240MB/s to 380MB/s, making me a happy admin. The problem now is that my apache tomcat becomes deadlocked during startup, running with 200% CPU (I have 2 CPUS assigned to the VM), and don't know how to get both: A stable system and a fast system. I somewhere heared that paravirtualization is legacy anyway and won't be available on newer ESX servers. Is there a replacement for this seemingly performance-improving option, or is it discontinued becauses it is just unstable? What is the state of paravirtualization? Should I ignore it completely? Thanks for all answers in advance.

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• Web & SQL Hosting 32 vs. 16 GB of ram

  - by TravisK

  I'm in the market for a new dedicated host for my website. My question is I can pay more to upgrade to 32GB of RAM, but it seems overkill for my website right now, in fact, 16GB seems a little overkill. However, I run a lot of pretty intense full text searches for my site. I'm wondering if SQL Server would benefit, or could it be configured to use the 32 GB of RAM if I purchase the additional to help speed things up? I am assuming that most of my latency is caused by disk I/O and that for the extra money spent on RAM, I might not see any improvement in overall speed?

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• Macrium Reflect Server v5 for Server Cloning?

  - by Stephane

  I'm starting to have clients with basic windows server setups. They have data backups, but no real strategy for system backups. I've been looking at cloning software which with linux or images seems easy enough (aside from DC complications, and other things I'm going to ignore until I learn more). What do people do when you have a non-disk hardware failure? I"ve been looking at server migration backup solutions and this one seems to be the cheapest. Anyone tried this? What more do I need to do to safeguard server setups? The hardware on these systems is a little out of date with Server 2003 setup at both businesses. Thanks!

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• High Lock Wait ratio in MySQL

  - by FunkyChicken

  on my site I log every pageview (date,ip,referrer,page,etc) in a simple mysql table. This table gets very little selects (3 per minute), but a lot of inserts. (about 100 per second) Today I changed this table from an InnoDB table to a MEMORY table, this made sense to me to prevent unnecessary hard disk IO. I also prune this table once per minute, to make sure it never get's too big. -- Performance wise, things are running fine. But I noticed that while running tuning-primer, that my Current Lock Wait ratio is quite high. Current Lock Wait ratio = 1 : 561 My question: Should I worry about this Lock Wait Ratio? And is there something I can change in my my.cnf to improve things so that the lock wait ratio isn't so high?

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• My NTFS Partition keeps becoming "unusable" on Ubuntu, Any Ideas?

  - by gopherman

  I just purchased a new 2TB Drive External Seagate, My main system uses both Windows and Ubuntu So I am pretty much stuck with keeping my drive as NTFS. I have done this without any problems before but since I got this new drive I have been having issues. When I first load up Ubuntu the drive mounts and runs fine, after an unspecified amount of time i start getting Input/Output errors when accessing the drive. When I goto the Disk Utility I get a message stating the drive is "Unknown or Unused", If I disconnect and reconnect the drive or reboot everything is fine again. There's no errors coming up with S.M.A.R.T and it seems to work fine while under windows. Any thoughts?

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• My NTFS Partition keeps becoming "unusable" on Ubuntu, Any Ideas?

  - by gopherman

  I just purchased a new 2TB Drive External Seagate, My main system uses both Windows and Ubuntu So I am pretty much stuck with keeping my drive as NTFS. I have done this without any problems before but since I got this new drive I have been having issues. When I first load up Ubuntu the drive mounts and runs fine, after an unspecified amount of time i start getting Input/Output errors when accessing the drive. When I goto the Disk Utility I get a message stating the drive is "Unknown or Unused", If I disconnect and reconnect the drive or reboot everything is fine again. There's no errors coming up with S.M.A.R.T and it seems to work fine while under windows. Any thoughts?

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• Copying a large directory tree locally? cp or rsync?

  - by Rory

  I have to copy a large directory tree, about 1.8 TB. It's all local. Out of habit I'd use rsync, however I wonder if there's much point, and if I should rather use cp. I'm worried about permissions and uid/gid, since they have to be preserved in the clopy (I know rsync does this). As well as thinks like symlinks. The destination is empty, so I don't have to worry about conditionally updating some files. It's all local disk access, so I don't have to worry about ssh or network. The reason I'd be tempted away from rsync, is because rsync might do more than I need. rsync checksums files. I don't need that, and am concerned that it might take longer than cp. So what do you reckon, rsync or cp?

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• Does Intel Smart Response provide any statistics on the cache usage?

  - by Tom Seddon

  I've set up my Z68-based Core i7 PC with a 60GB SSD dedicated as a Smart Response cache drive. Is there any way I can get any statistics out of it? It would be nice to have some information on how much cache space is actually being used, maybe how much of it was actually accessed recently, and how many reads in general are coming from the SSD rather than from the mechanical disk. These statistics might help to quickly provide some evidence for or against the use of Smart Response, without my having to reinstall Windows on the SSD (etc.) to find out. The Windows ReadyBoost feature has some performance counters you can access via the Windows 7 perfmon tool, for example, which is the kind of thing I'm hoping is somehow available. Smart Response provides no perfmon counters, though, and the Intel Rapid Storage Utility tells you pretty much nothing except that Smart Response is switched on.

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• Emulate a USB port as a USB flash drive?

  - by Wilco

  Does anyone know of any software that can emulate a USB flash drive through an available USB port in OS X? Perhaps some way to map a directory to a USB port that could then be connected to another device that supports reading USB storage devices? I'd love to connect my laptop to my car's USB port and access files as if it were a USB drive. I know about the target disk mode with firewire (not sure if this is also supported over USB), but I was hoping for something that doesn't require booting outside of the OS (I want to retain use of the machine). Any ideas?

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• ESXi 4 failed to find boot device

  - by phil

  I had exsi 3.5 running just fine, the upgrade to 4 failed ( i thought it would so everything is backed up ). but it did boot just could not import the data store So i did a fresh install of ESXi 4. Now it says failed to find boot device. Not sure why. i have wiped the disk, the controller is a adaptec 3405, it worked fine in 3.5 and when i upgrade to 4 it did boot. Now it just hangs at loading vfat. then the failed to find boot device. Any ideas?

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• VirtualBox cloned Ubuntu Server network error

  - by Luke

  I run a number of virtual servers on my network and I want to be able to easily clone base installations of Ubuntu Server. I use the VBoxManage command to clone the actual hard disk and I then create a new profile for my VM and copy over the settings of the original VM. However, when I boot into the cloned VM, there seems to be a network problem. When I issue a PING I get the message "Network unreachable". I traced it down to the fact that the virtual network card of the cloned VM has a different MAC address then the original VM. When I copy the MAC address the clone seems to work fine. How can I have the cloned VM have it's own MAC address?

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• CD-R suddenly unreadable?

  - by TheD

  I have a CD-R which has worked fine for a good while. All of a sudden, Windows can no longer read its data. It's not scratched, it's clean and Windows can detect the disk and usage of space on it. But whenever I attempt to access the data stored: Explorer crashes Or after 5-10 mins of trying to read it, it opens up and just shows a desktop.ini file in Explorer. This happens on multiple machines. Any ideas? Is there a way to recover the data? For example - some sector by sector recovery software if any exist for CD's?

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• How do I stop ubuntu waiting for me to "Press S to skip of C to continue..." when it fails to mount on startup?

  - by Jon Cage

  I've been having some issues with my RAID setup recently on my headless Ubuntu 10.04 server which means one of my mount requests is failing on bootup. Clearly I need to fix the RAID issue, but this machine is in my loft and having to crawl up there with a keyboard just so I can hit S a few times is extremely irritating. The exact message is as follows: The disk drive for /drv/photos is not ready yet or not present Continue to wait; or Press S to skip mounting or M for manual recovery I'd still like Ubuntu to try and mount it, but is there any way to tell it not to wait for the device?

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• Upload large database SQL file

  - by Devy

  I've a database of more than 20Gb of size on my hard disk. What is the best way to upload it with the least (money) load possible on the server? - I'm on Windows 7. - I have FTP and SSH access on the server. I avoid using FTP because my connection cuts off a lot, I can't imagine I re-upload again the file after failing on 99%. I found some tools that split the large .sql file to small .sql files, but they didn't mention how to gather these files again into one file. Another way is to archive the big .sql file to .rar with -v option, upload them through FTP then unpack them. But unpacking will also cost, right? I know it will cost in any cases, but any best practice will be strongly appreciated.

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• Truecrypt system partion partially encryted but then drive corrupted and won't boot - decrypting so I can access files to backup?

  - by Dr.Seuss

  So I was attempting to encrypt my (Windows 7) system drive with Truecrypt and it stopped at around 15% and said that there was a segment error and that it could not proceed until it was fixed. So, I restarted the computer and ran HDD Regenerator which subsequently fixed the bad sectors on the drive, but now my system cannot boot. So, I run a number of recovery disks to no avail (Windows repair is unable to fix) and the drive won't mount on a linux version run from a CD because the drive is encrypted. So I tried mounting the drive using Truecrypt under the Linux distribution on the disk and selected "Mount partition using system encryption without pre-boot authentication" so I can decrypt, but I get an error message about it only being possible once the entire system is encrypted. How do I get out of this mess? I need to be able to back up the data that's on that partially encrypted drive so I can reinstall my operating system.

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• WD Passport Won't Mount

  - by Scott7278

  My WD Passport won't mount. However, it turns on when plugged into my macbook and doesn't make any strange noises. It took a small fall (just a few inches and it was on my couch) and I'm very concerned about physical damage. When I open up disk utility it shows the root 500 GB WD My Passport drive which seems to be OK when I verify it and repair it. However, the "External Hard Drive", the directory underneath the "500 GB WD My Passport drive" is grayed out. When I verify the External Hard Drive it says it needs to be rapaired. When I try and repair it it gives me the following message and does not seem to progress: "Updating boot support partitions for the volume as required." Is there hope for me recovering my data? I stupidly have important data on it that I don't have anywhere else.

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• Smart backup software

  - by gisek

  I use a laptop on daily basis. As I have a lot of important data there it would be nice to do backups of some directories every day. Can you recommend a specific application that would take care of it? Maybe there is an app that would instantly commit changes I make in a directory on my laptop to the backup folder? The important thing is that I have some big files (a few GB's) that have some minor changes very often. I'm talking about VirtualBox disk images. It would be nice if the software could handle it smartly. Also notice that I'd like to store it on an external usb HDD, which sometimes isn't plugged in.

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• How to find what is written to filesystem under linux

  - by bardiir

  How can i find out what processes write to a specific disc over time? In my particular case I got a little homeserver running 24/7 and I included a script in the crontab to shutdown all drives that are not used (no change in /proc/diskstats for 15 minutes). But my system disc won't come down at all. I'm suspecting logs but it's probably not only logs writing to the filesystem on the system disk and I don't want to go all the way moving the logfiles to something else just to find out the disc still doesn't spin down and there's nothing i can do against it.

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• Create a web interface that starts VM's on the server side

  - by xdragonforce

  I am creating a service called TorCompute which allows for creating virtual Tor Hidden Service servers on my infrastructure (I say infrastructure, by that I mean just the 3x 32GB RAM machines waiting to be purchased). What I would like to be able to do is for users to log on, access the web interface and spin up a VM with a variable about of RAM/Disk Space. I've written the PHP for logging in and have a nice web interface, just I need the code to actually create them! How would I go about doing this? Thanks, Stewart EDIT: I will run them with VMWare Server, with vmrun

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• Reverse lookup of inode/file from offset in raw device on linux and ext3/4?

  - by lilinjn

  In linux, given an offset into a raw disk device, is it possible to map back to an partition + inode? For example, suppose I know that string "xyz" is contained at byte offset 1000000 on /dev/sda: (e.g. xxd -l 100 -s 1000000 /dev/sda shows a dump that begins with "xyz") 1) How do I figure out which partition (if any) offset 1000000 is located in?(I imagine this is easy, but am including it for completeness) 2) Assuming the offset is located in a partition, how do I go about finding which inode it belongs to (or determine that it is part of free space) ? Presumably this is filesystem specific, in which case does any one know how to do this for ext4 and ext3?

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• people_dl_import shows millions of records

  - by amit lohogaonkar

  We have a situation now on prod in sharepoint 2007 based intranet platform and it shows thousands of records under people_dl_import category with format spsimport://?$$dl$$/domain1/domain2/domain3/ Also import was not stopping and added millions of records in database and was on verge of disk full. On other servers like dev we have very less data in this category and format is also like spsimport://doaminname?$$dl$$?... which is good and has only 6000 rows and in prod its 2 millions Crawled under people_dl_import category. I need to know the cause of this garbage data and how to fix it. I tried resetting content source and I will do full import in this weekend to see if this garbage data gets cleared. Any idea on cause for thiss issue?

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• How to configure Time Machine to also backup an connected external hard drive?

  - by Another Registered User

  I've inserted a sweet SSD into my MacBook Pro, but it had limited space. So I had to export 60 GB of Data to an external hard drive. But now, when I run TimeMachine to backup my stuff, of course it only backups what's on the system disk. Is there a way how to also backup the connected external hard drive together with TimeMachine? Maybe there's a trick to get this work, with a fake folder that's actually the mounted drive? What could I do?

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• 2 "P4" power connectors *AND* an 8 pin EPS connector -- all necessary?

  - by chris

  I recently bought an Arima SW350 motherboard. It supports 16 ddr simms as well as 2 opteron 2xx CPUs, so I imagine it may have pretty heavy power requirements... It has a 24 pin ATX power connector, 2 4 pin "P4" power connectors, and an 8 pin EPS power connector. My supermicro power supply has a 24 pin ATX connector and the EPS connector, and one P4 connector. Can I safely run this thing with only one P4 connector plugged in? Can I safely get a "hard disk to P4" adapter and use that to power the other P4 connector on the motherboard? Do I just need a new power supply? The board's documentation is pretty thin on the topic.

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