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• Can a virus corrupt a hard disk?

  - by sundar

  Shorter version: Hard disk corrupt, vendor claims warranty does not apply since it was "due to a virus" and "problems due to software are not covered under the warranty". Longer version: My Dell laptop recently refused to boot, and all attempts to 'repair' the Vista installation using the provided installation CD failed. I called up Dell support, and a representative took the laptop and after a day said the hard disk is corrupt. When I tried to ask for a replacement under the warranty, an official replied that the corruption was due to a virus, and "problems due to software are not covered under the warranty". Now, I get a doubt that he's trying to avoid having to provide it under the warranty. Is it possible for a hard disk to get corrupt due to a virus? If yes, is there any way we can detect it was due to a virus (as he claims to have detected)?

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• Format an external hard disk

  - by Alex

  I am trying to format an external hard disk to FAT32 (I need it to work with some hardware that expects it to be in FAT32). When I am trying to format it via windows the only option I'm getting is to format it to NTFS. Another strange thing is that when I am trying to format one of my own partitions (on the hard disk that is running the OS) I can do it only in NTFS while another partition my OS can format in both NTFS and FAT32. What can cause such a behavior and how can I format the external hard disk to FAT32?

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• sudo dhclient eth0 | sudo: unable to resolve host ubuntu

  - by Merianos Nikos

  I have a computer of a friend of mine, that runs Ubuntu (I don't know what version, due to the current system status) and while he was updating the kernel, he reboot the computer (yes that could be happen !!, anyway) Currently I am trying to recover the system by using a live USB, with Ubuntu installed on it. What I am doing, is the following: Update Failure The problem is that when I try to execute the fifth step, I am getting error because I do not have Internet access. The computer is properly wired on my rooter, and I have Internet access in any place apart of the shell. This message for example is send it via the live USB. but I cannot access the Internet via the shell. In my shell I try to use this command: sudo dhclient eth0 but the result of this command is the following message sudo: unable to resolve host ubuntu My hosts file has the following content: 127.0.0.1 localhost 127.0.1.1 ubuntu # The following lines are desirable for IPv6 capable hosts ::1 ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts how can I get connected on the Internet, in order to download the appropriate updates ? UPDATE 1 I just notice, that when I execute the ifconfig I am getting the following warning: Warning: cannot open /proc/net/dev (No such file or directory). Limited output. UPDATE 2 I just found that, and looks like solving the problem with dhclient eth0 command, but still I cannot ping Google UPDATE 3 Now the sudo dhclient eth0 returns the following message: RTNETLINK answers: File exists UPDATE 4 I just ping my rooter and I getting response, so, it is looks like I cannot ping outside the rooter (ie. Google) Kind regards ...

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• Raid 5 mdadm Problem - Help Please

  - by user66260

  My Raid 5 array (4 1tb Disks WD10EARS) had was showing as degraded. I looked and one of the disks wasnt installed, so i re-added it with the mdadm add command. the array is now showing as (null)Array , but cant be mounted if i run: root@warren-P5K-E:/home/warren# sudo mdadm --misc --detail /dev/md0 I get: mdadm: cannot open /dev/md0: No such file or directory and running: root@warren-P5K-E:/home/warren# cat /proc/mdstat gives me: Personalities : [linear] [multipath] [raid0] [raid1] [raid6] [raid5] [raid4] [raid10] unused devices: < none > The data is very important root@warren-P5K-E:/home/warren# mdadm --examine /dev/sda /dev/sda: Magic : a92b4efc Version : 0.90.00 UUID : 00000000:00000000:00000000:00000000 Creation Time : Sat May 26 12:08:14 2012 Raid Level : -unknown- Raid Devices : 0 Total Devices : 4 Preferred Minor : 0 Update Time : Sat May 26 12:08:40 2012 State : active Active Devices : 0 Working Devices : 4 Failed Devices : 0 Spare Devices : 4 Checksum : 82d5b792 - correct Events : 1 Number Major Minor RaidDevice State this 1 8 0 1 spare /dev/sda 0 0 8 16 0 spare /dev/sdb 1 1 8 0 1 spare /dev/sda 2 2 8 32 2 spare /dev/sdc 3 3 8 48 3 spare /dev/sdd root@warren-P5K-E:/home/warren# mdadm --examine /dev/sdb /dev/sdb: Magic : a92b4efc Version : 0.90.00 UUID : 00000000:00000000:00000000:00000000 Creation Time : Sat May 26 12:08:14 2012 Raid Level : -unknown- Raid Devices : 0 Total Devices : 4 Preferred Minor : 0 Update Time : Sat May 26 12:08:40 2012 State : active Active Devices : 0 Working Devices : 4 Failed Devices : 0 Spare Devices : 4 Checksum : 82d5b7a0 - correct Events : 1 Number Major Minor RaidDevice State this 0 8 16 0 spare /dev/sdb 0 0 8 16 0 spare /dev/sdb 1 1 8 0 1 spare /dev/sda 2 2 8 32 2 spare /dev/sdc 3 3 8 48 3 spare /dev/sdd root@warren-P5K-E:/home/warren# oot@warren-P5K-E:/home/warren# mdadm --examine /dev/sdc /dev/sdc: Magic : a92b4efc Version : 0.90.00 UUID : 00000000:00000000:00000000:00000000 Creation Time : Sat May 26 12:08:14 2012 Raid Level : -unknown- Raid Devices : 0 Total Devices : 4 Preferred Minor : 0 Update Time : Sat May 26 12:08:40 2012 State : active Active Devices : 0 Working Devices : 4 Failed Devices : 0 Spare Devices : 4 Checksum : 82d5b7b4 - correct Events : 1 Number Major Minor RaidDevice State this 2 8 32 2 spare /dev/sdc 0 0 8 16 0 spare /dev/sdb 1 1 8 0 1 spare /dev/sda 2 2 8 32 2 spare /dev/sdc 3 3 8 48 3 spare /dev/sdd root@warren-P5K-E:/home/warren# mdadm --examine /dev/sdd /dev/sdd: Magic : a92b4efc Version : 0.90.00 UUID : 00000000:00000000:00000000:00000000 Creation Time : Sat May 26 12:08:14 2012 Raid Level : -unknown- Raid Devices : 0 Total Devices : 4 Preferred Minor : 0 Update Time : Sat May 26 12:08:40 2012 State : active Active Devices : 0 Working Devices : 4 Failed Devices : 0 Spare Devices : 4 Checksum : 82d5b7c6 - correct Events : 1 Number Major Minor RaidDevice State this 3 8 48 3 spare /dev/sdd 0 0 8 16 0 spare /dev/sdb 1 1 8 0 1 spare /dev/sda 2 2 8 32 2 spare /dev/sdc 3 3 8 48 3 spare /dev/sdd That on the 4 drives.

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• Cluster Nodes as RAID Drives

  - by BuckWoody

  I'm unable to sleep tonight so I thought I would push this post out VERY early. When you don't sleep your mind takes interesting turns, which can be a good thing. I was watching a briefing today by a couple of friends as they were talking about various ways to arrange a Windows Server Cluster for SQL Server. I often see an "active" node of a cluster with a "passive" node backing it up. That means one node is working and accepting transactions, and the other is not doing any work but simply "standing by" waiting for the first to fail over. The configuration in the demonstration I saw was a bit different. In this example, there were three nodes that were actively working, and a fourth standing by for all three. I've put configurations like this one into place before, but as I was looking at their architecture diagram, it looked familar - it looked like a RAID drive setup! And that's not a bad way to think about your cluster arrangements. The same concerns you might think about for a particular RAID configuration provides a good way to think about protecting your systems in general. So even if you're not staying awake all night thinking about SQL Server clusters, take this post as an opportunity for "lateral thinking" - a way of combining in your mind the concepts from one piece of knowledge to another. You might find a new way of making your technical environment a little better. Share this post: email it! | bookmark it! | digg it! | reddit! | kick it! | live it!

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• Troubleshoot broken ZFS

  - by BBK

  I have one zpool called tank in RaidZ1 with 5x1TB SATA HDDs. I'm using Ubuntu Server 11.10 Oneric, kernel 3.0.0-15-server. Installed ZFS from ppa also I'm using zfs-auto-snapshot. The ZFS file system when zfs module loaded to the kernel hangs my computer. Before it I created few new file systems: zfs create -V 10G tank/iscsi1 zfs create -V 10G tank/iscsi2 zfs create -V 10G tank/iscsi3 I shared them through iSCSI by /dev/tank/iscsiX path. And my computer started to hanging sometimes when I used tank/iscsiX by iSCSI, do not know why exactly. I switched off iSCSI and started to remove this file systems: zfs destroy tank/iscsi3 I'm also using zfs-auto-snapshot so I had snapshots and without -r key my command not destroying the FS. So I issued next command: zfs destroy tank/iscsi3 -r The tank/iscsi3 FS was clean and contain nothing - it was destroyed without an issue. But tank/iscsi2 and tank/iscsi1 contained a lot of information. I tried zfs destroy tank/iscsi2 -r After some time my computer hang out. I rebooted computer. It didn't boot very fast, HDDs starts working like a crazy making a lot of noise, after 15 minutes HDDs stopped go crazy and OS booted at last. All seems to be ok - tank/iscsi2 was destroyed. After file systems at the tank was accessible, zpool status showed no corruption. I issued new command: zfs destroy tank/iscsi1 -r Situation was repeated - after some time my computer hang out. But this time ZFS seams not to healed itself. After computer switched on it started to work: loading scripts and kernel modules, after zfs starting to work it hanging my computer. I need to recover else ZFS file systems which lying in the same zpool. Few month ago I backup OS to flash drive. Booting from backed-up OS and import have the same results - OS starts hanging. How to recover my data at ZFS tank?

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• Tape vs. Disk: Tape Refuses to be Evicted

  Like a tenant who refuses to be evicted from an area earmarked for redevelopment, tape is alive and kicking. When it comes to long-term backup retention and archiving, it is holding its own against dedupe &#151; especially among large enterprises.

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• Tape vs. Disk: Tape Refuses to be Evicted

  Like a tenant who refuses to be evicted from an area earmarked for redevelopment, tape is alive and kicking. When it comes to long-term backup retention and archiving, it is holding its own against dedupe &#151; especially among large enterprises.

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• So my disk is quite fast...

  - by Kit Ong

  Hilarious Samsung SSD viral marketing video: http://www.youtube.com/watch?v=96dWOEa4Djs&feature=fvw

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• Xubuntu: Disks utility (palimpsest) and Gparted not showing up anywhere after installation

  - by Noam Gagliardi

  So I've downloaded Gparted and Disks from the software center. According to software center, they've both installed successfully... but they're nowhere to be found. Even in my terminal: $ palimpsest palimpsest: command not found I've looked in usr/bin... no "palimpsest", no "gnome-disk-utility". In usr/share/gnome-disk-utility there's a bunch of .ui files. According to Software Center, both programs are now installed in my computer, but it seems I've no way to find them. I've tried re-installing and restarting. I'm on Xubuntu 32 bit.

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• How to recover data from a failing hard drive?

  - by intuited

  An external 3½" HDD seems to be in danger of failing — it's making ticking sounds when idle. I've acquired a replacement drive, and want to know the best strategy to get the data off of the dubious drive with the best chance of saving as much as possible. There are some directories that are more important than others. However, I'm guessing that picking and choosing directories is going to reduce my chances of saving the whole thing. I would also have to mount it, dump a file listing, and then unmount it in order to be able to effectively prioritize directories. Adding in the fact that it's time-consuming to do this, I'm leaning away from this approach. I've considered just using dd, but I'm not sure how it would handle read errors or other problems that might prevent only certain parts of the data from being rescued, or which could be overcome with some retries, but not so many that they endanger other parts of the drive from being saved. I guess ideally it would do a single pass to get as much as possible and then go back to retry anything that was missed due to errors. Is it possible that copying more slowly — e.g. pausing every x MB/GB — would be better than just running the operation full tilt, for example to avoid any overheating issues? For the "where is your backup" crowd: this actually is my backup drive, but it also contains some non-critical and bulky stuff, like music, that aren't backups, i.e. aren't backed up. The drive has not exhibited any clear signs of failure other than this somewhat ominous sound. I did have to fsck a few errors recently — orphaned inodes, incorrect free blocks/inodes counts, inode bitmap differences, zero dtime on deleted inodes; about 20 errors in all. The filesystem of the partition is ext3.

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• Backup to disk, encrypted, without any installed local software

  - by user30064

  Hi, Ok, this is a tough one, and it might not even be possible, but no harm in asking I guess. I have a Buffalo Terastation file server that I use for network attached storage. After a couple of phone calls to customer services I realised that there is no way to backup to disk encrypted. In effect, I would be carrying unencrypted company data off-site daily, which is obviously unacceptable. I had a go at TrueCrypt, EncFS, and a few others, and as far as I could see all of them required that you install some software on the machine that is to use the file system, which makes sense. Unfortunately the firmware on the Terastation is closed and I cannot install any software (and I can't build from source either, since Buffalo didn't include a compiler). Are there any ways to copy files to disk, where as soon as they are written to the disk they are transparently encrypted, without having to install additional software? I'm not sure it matters too much, but the Terastation firmware is Linux based, although as I mentioned, closed. Many thanks, Andreas

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• Ubuntu 12 Server messing up my hard disk

  - by Jeroen Jacobs

  I'm installing Ubuntu server on a disk with 12GB available. During the setup, I choose the default LVM-based partition layout. However for some reason, Ubuntu decides that it only wants to use 4GB of this disk. How do I reclaim the remaining space of the hard disk? "lvextent" doesn't work btw... output of df -h: Filesystem Size Used Avail Use% Mounted on /dev/mapper/ubuntu-root 4.3G 3.4G 754M 82% / udev 3.9G 4.0K 3.9G 1% /dev tmpfs 1.6G 756K 1.6G 1% /run none 5.0M 0 5.0M 0% /run/lock none 3.9G 0 3.9G 0% /run/shm /dev/sda1 228M 25M 192M 12% /boot output of pvdisplay: --- Physical volume --- PV Name /dev/sda5 VG Name ubuntu PV Size 12.32 GiB / not usable 2.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 3154 Free PE 8 Allocated PE 3146 PV UUID dD06RZ-kGcL-1tTX-Ruds-XIDG-ssMd-FIUkzZ my partitions: Device Boot Start End Blocks Id System /dev/sda1 * 2048 499711 248832 83 Linux /dev/sda2 501758 26343423 12920833 5 Extended /dev/sda5 501760 26343423 12920832 8e Linux LVM when I try lvextent, it says there is not enough diskspace.

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• Windows 2008 R2 software RAID 1 (disk failure)

  - by thj

  I've bought myself a new server that I'm going to use for some various software developing projects. I have a simple question about Windows 2008 R2 x64 software raid. What if disk 1 fails? Will it automatically swap over to disk 2? And boot up on disk 2 after reboot? Or how do you handle this? Should I use some tools for monitoring my RAID 1? So if it fails or if there are any errors, I will receive an email. Do you know of a tool capable of this? Or can I do it by having a tool monitoring the event viewer? Finally, I'm looking for a tool to test the speed (read/write) of my harddrives, before and after introducing RAID 1. What's the best free tool out there?

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• Can I get "disk utilization" from a NetApp filer via SNMP?

  - by Andrew

  On a NetApp filer's command line I'm running "sysstat -u" to show disk utilization, (actually the utilization of the single busiest disk). By disk utilization, I mean "percent of time the disk is busy", not "how much space on the disk is being used to store data/metadata". Is there a way to get disk utilization info through SNMP? The netapp.mib file doesn't appear to expose this. It does have CPU utilization, disk usage & capacity information, etc, but not disk utilization. The MIB-II (rfc1213) seems to be the only other information exposed by the filer through SNMP. I hope I am missing something. The "CP (consistency point) time" metric is exposed through the NETAPP-MIB in SNMP, but this seems to only partially correlate with disk utilization under write load, and not really at all under read load.

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• How can I get data off of a (probably) very corrupt drive?

  - by Mercury1964

  So, my younger brother wanted my help today. Apparently, he was helping a friend install Ubuntu to his laptop, and midway through the install (on a filled hard-drive with Windows 8, from the liveusb thing): 1) They realized that they had chosen "Erase and install" accidentally and decided the best course of action was to (in the middle of an install, remember) 2) Force shutdown the computer. After I had replaced my eyeballs back into their sockets, my bro asked if I could do anything about his friend's data, which he wanted back. This, however, drifts out of my normal comfort zone. I know this about the install: 1) It was on a fairly new Windows 8 laptop, so it had whatever filesystem it uses nowadays on the entire drive 2) They didn't choose the "zero out drive data" option 3) They stopped the install at some point (not sure if before or after wipe) I can imagine that it now has two corrupted filesystems on it (whatever Windows 8 was on and ext3) and that some of the data still exists (assuming it wasn't overwritten already). Is there anything that can be done for whatever data is left on the drive?

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• Import emails from hard disk image?

  - by Chen Xiao-Long

  My old Pentium 3 email server just died on me. Is it possible import all my emails that I had? I was running postfix and the cyrus IMAP server. I can chroot to the hard drive to run any commands if needed. After grep'ing the hard drive, I found that all of my emails are in /var/spool/imap. I assume that I can't just copy all the emails to my new server, so what do I need to do to get them onto my new server?

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• PGP Desktop Whole disk Encryption paused on a toshiba ultrabook z935

  - by garg

  I have a Toshiba z930 Ultrabook with PGP Desktop installed for whole disk encryption. It installed correctly, and started encrypting but it stays paused. If I reboot, it shows me the PGP desktop username, password, domain screen. If I enter in my credentials, it allows me to get into windows but encryption remains paused. If I click on resume, it lets me enter a password, accepts it but then it doesn't do anything. One suspicious thing is that in the 'Select disk or partition to encrypt' box, it says, C: 120B fixed disk. Unknown Bus: TOSHIBA THNSNS12... Do I need to change something in the BIOS, or install any drivers so that it doesn't see it as an Unknown Bus?

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• Live boot from hard disk problem

  - by user172277

  I've installed Ubuntu Desktop 13.04 32bit. Next I configured /etc/grub.d/40_custom to boot live system from ubuntu.iso (also Desktop 13.04 32 bit) I used configuration: menuentry "Ubuntu 13.04 Desktop" { loopback loop /boot/ubuntu.iso linux (loop)/casper/vmlinuz.efi boot=casper iso-scan/filename=/boot/ubuntu.iso noeject noprompt splash -- initrd (loop)/casper/initrd.lz } and it works OK. Later I made some changes on my installed ubuntu. I made some configuration, installed additional packages and so on. After that I made backup using remastersys tool. Remastersys gave me new ISO file. So I wanted to use it. And here was first problem. Remastersys creates only initrd.gz file. So I changed the grub configuration form: initrd (loop)/casper/initrd.lz to: initrd (loop)/casper/initrd.gz But after that, when I reboot my system I get error: /init: line 3: can't open /dev/sr0: No medium found Any ideas how to fix it? Best Regards, Bartosz

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• Is my disk hot or not?

  - by adriangrigore

  I am trying to figure out the temperature of my dedicated server's harddisk. For this purpose, I've downloaded HDTune to monitor the S.M.A.R.T. Status. The problem is that the current temperature for "C2 Temperature" is 73 degrees celsius, but the little thermometer on top of the window shows 27 degrees celsius. See this screenshot: http://screencast.com/t/OGJhZGIxND Another monitoring software (Anfibia Reactor) shows similar behavior: Disk temperature is around 30 degrees, but it says that the disk is too hot. So, is my disk hot or not? Since this is a dedicated server, I can't just open the case and put a thumb on it.

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• cannot use sudo on ubuntu server passwordless authentication?

  - by Lucas Crijns

  Hello I'm new at the forum and I want to introduce myself: I'm Lucas Crijns and I'm a very happy user of ubuntu server. I was reading about passwordless authentication with ssh. So I made a key and published it to ubuntu server, it worked well and I could login with my private key. But then I locked the account to prevent hacking from my password. After I ran "passwd -l lucas", I was not longer able by my next login to use sudo. Because it was asking for a password and I locked it. I was thinking that sudo would also be without a password. My question is now: is it possible to use sudo? And how can I enable it without a valid password for sudo? Thank you for your help!

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• Move data from others user accounts in my user account

  - by user118136

  I had problems with compiz setting and I make multiple accounts, now I want to transfer my information from all deleted users in my current account, some data I can not copy because I am not right to read, I type in terminal "sudo nautilus" and I get the permission for read, but the copied data is available only for superusers and I must charge the permissions for each file and each folder. How I can copy the information with out the superuser rights OR how I can charge the permissions for selected folder and all files and folders included in it?

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• Terminal will not accept password / terminale non accetta password

  - by elvizz67

  Translation, by Google Translate: I just installed lxde Lubuntu errrato and a terminal command I locked the package management and updates, after erasing software from sources I typed the wrong command sudo apt-get upgrade pero'il terminal asks me the password and the keyboard is not me accept any command. What should I do to unlock? Original text: Ho appena installato lubuntu lxde e per una errrato comando il terminale mi ha bloccato la gestione pacchetti e aggiornamenti, dopo avere cancellato dalle fonti software il comando sbagliato ho digitato sudo apt-get upgrade pero'il terminale mi chiede la password e la tastiera non mi accetta nessun comando. cosa devo fare per sbloccare ?

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• continuous hard disk access - slowing down my machine

  - by suresh

  I find from the hard disk access LED on the front of my machine that the hard disk is being accessed more often and probably because of that, my machine is quite slow. The machine becomes unresponsive even when the load as seen from w command is around 1 or so. My desktop is optiplex 360 dell machine running Ubuntu 10.04. My questions are: How to quantify hard disk access and how to see if it is more than "normal" ? If it is more than normal, what are my solutions ? thanks suresh

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• How to reload UBUNTU11.04 again which is hidden in the hard disk

  - by Yaskadeva

  I had installed Ubuntu 11.04 as another OS ( not inside Windows). means every time i used to get a Ubuntu screen and i can select Ubuntu or windows. but once i formatted my windows. after that the 38 gb memory which was used under Ubuntu is missing means the ubuntu is there and as it is EXT type windows is not able to access that. and i am not able to boot into it.I need ubuntu i can install new version but my memory is being wasted i do not kno what to do. pl reply me asap.

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