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• Linux RAID0 - relocating member disk

  - by qdot

  I've got an issue I would rather handle with the array online - I am using RAID0 for temporary video storage - data that is low-cost to restore, but that is used frequently. The software array looks like this: md1 : active raid0 sdb1[2] sdc1[3] sdd1[0] sde1[1] 1953487616 blocks 64k chunks I have another partition (sda1) in this system, that I want to use to replace sdc1 (The drives are of varying age, and sdc1 is definitely the slowest one, limiting the entire array's sequential read performance to only 300MB/s). Is there a way to migrate the data from sdc1 to sda1 while the array is still online?

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• Enable bitlocker an save key to share

  - by user273694

  I have searched all over the web but cannot find a complete answer to this: How to enable Bitlocker on a laptop with TPM, and store a file with the Bitlocker recovery key and TPM password by USING THE manage-bde command line tool. The file should be the same as when created in the Bitlocker manager UI. I DO NOT want to save to AD. The same question was asked here but was not answered correctly. The goal is to write a script to be used with an endpoint manager. I have tried the following: manage-bde -on C: Works fine, but does not create or save a key. manage-bde -on C: -rk C:\myfolder\ and manage-bde -on C: -RecoveryKey C:\myfolder\ -rp The output from the last two methods state that a key has been saved to c:\myfolder and so on, but that is not the case. It also says that I have to: Save the password in a secure location Insert a USB flash drive with an external key file into the computer. Restart and run hardware test type "manage-bde -status" to check if the hardware test succeeded After a restart, I get an error saying that Bitlocker could not be enabled because the bitlocker startup key or recovery kpassword cannot be found on the USB device.... C: was not encrypted. Why am I asked to insert a USB?? I simply want to encrypt the hard drive and save the recovery information to a file automatically. Is that too much to ask? Help please!

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• About Hard Disk Drive Docks

  - by Crossbrowser

  I'm thinking of buying a drive dock to put my unused large HDD to use. I will also probably use the dock to backup files and swap the drives regularly. I have a few questions though: Are they noisy? I plan to use them via USB (because I don't think I have eSata connectors), am I gonna want to kill myself every time I backup? (I know it's supposed to be 480 Mbps, but how realistic is this?) Do you recommend a particular model? (I was thinking about this Startech HDD dock) Thank you

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• Suppress "running out of disk space" Message (per drive) on Windows Server 2003

  - by Shoeless

  We have a database server with separate drives for OS, various data files and the transaction log. Our transaction log spills over onto other volumes as well- this is expected behavior. The problem is that we are constantly getting popups that our transaction log drive is out of space (and that I can free space by deleting old or unnecessary files). Is there some way to prevent this message from popping up for this particular drive?

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• How to protect Ruby on Rails code on external server?

  - by Phil Byobu

  I have to deploy a Ruby on Rails Applications on a client's server and I do not want them to be able to view or modify the source code. How would you protect the code technically? I thought about building a linux-based virtual machine with an encrypted filesystem where the application code resides. The client has no root access, or direct access to the system at all. All services start automatically and the application is ready to use. What would you suggest?

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• Formatting a 5.25" floppy disk

  - by Spütnik

  So after the massive trouble of finding a 5.25" floppy drive and a connecting it up, then changing the BIOS so it's set as my A: drive, I tried to format a couple of high-density 1.2MB floppy disks using the "format A:" command in Command Prompt. Both times it formatted only 160KB and left it at that. If I then check the amount of space on those disks, it then comes up as 160KB. Why is this the case? How can I get my the full value out of my 1.2MB? For reference, I have a Mitsubishi MF504C-318UG, which should support 1.2MB disks.

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• df says disk is full, but it is not

  - by Chris

  On a virtualized server running Ubuntu 10.04, df reports the following: # df -h Filesystem Size Used Avail Use% Mounted on /dev/sda1 7.4G 7.0G 0 100% / none 498M 160K 498M 1% /dev none 500M 0 500M 0% /dev/shm none 500M 92K 500M 1% /var/run none 500M 0 500M 0% /var/lock none 500M 0 500M 0% /lib/init/rw /dev/sda3 917G 305G 566G 36% /home This is puzzling me for two reasons: 1.) df says that /dev/sda1, mounted at /, has a 7.4 gigabyte capacity, of which only 7.0 gigabytes are in use, yet it reports / being 100 percent full; and 2.) I can create files on / so it clearly does have space left. Possibly relevant is that the directory /www is a symbolic link to /home/www, which is on a different partition (/dev/sda3, mounted at /home). Can anyone offer suggestions on what might be going on here? The server appears to be working without issue, but I want to make sure there's not a problem with the partition table, file systems or something else which might result in implosion (or explosion) later.

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• TrueCrypt System Favorite Volume doesn't mount automatically on boot

  - by Anders Hovgaard

  I've encrypted my system partition using TrueCrypt and I've read that I can mount my encrypted data partition (TrueCrypt volume) on boot by making it a "System Favorite" and giving it the same password as the system partition. However it doesn't work and I have to mount it manually every time. See this example. I've tried enabling "Cache pre-boot authentication password in driver memory (for mounting of non-system volumes)" in System - Settings, but that didn't change anything either. Any ideas?

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• SBS 2008 Script to connect - disconnect backup disk?

  - by Ed Fries

  I want to be able to leave multiple external drives connected to an SBS 2008 server and select which drive is used as a target for the backup without physically connecting/disconnecting the drive. Windows doesn't support this and my testing confirms that if 2 drives are connected there is little to no rotation between the target drives, the backup will run to the last drive it used if it is connected. Anyone have a script that will disconnect and reconnect a physical drive? Thanks!

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• Issues with hard disk secure erase

  - by John Watson

  I want to completely wipe all the data and both OSes (Ubuntu and Windows 7) from my hard drive. I tried DBAN but it gives me an error and does not run. I am looking for an alternative. After reading some articles online, I came to know that, using a Linux live CD, it can be done using either of following commands. a) sudo dd if=/dev/zero of=/dev/sda b) sudo shred -vfz -n 1 /dev/sda My questions are 1) Which option (a or b) is more secure (wipes everything) and faster? 2) Does either of the options damage the hard drive or anything? I want to use hard drive again i.e. installing Windows and Ubuntu again.

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• Making a hidden truecrypt volume with existing data

  - by Bill Grey

  I have a 1TB hdd, which I would like to encrypt. I would like to make a hidden volume, with almost nothing within but some decoy data, and the rest in a hidden volume. However, my driver is over 95% full. Is it still possible to do this, or would it have to be done on an empty drive, and then copy the data over? I could not find the answer to this question in the documentation. Also, how easy would it be to undo, or unencrypt the drive? Would it again need another empty drive to begin with?

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• Need hard disk recommendation for linux home server.

  - by neotracker

  Hello, I'm planing to build a little linux homeserver. It will mainly be used for storage and maybe as an media pc. I plan to build a software raid5 with 4 1.5TB or 2TB hard drives. I already decided to use the Western Digital Caviar Green 1.5 TB drive, but then I read about some problems with the WD green series about many drives failing and that they are not recommended for raid anyway. Of course, I couldn't find much facts on the issues so I thought I just ask here ;-) What hard drives would you recommended for a software raid5 setup? As I only need it for storage, the whole thing doesn't have to be too fast. So I prefer a cheap price and silence to great performance.

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• Solaris 10 5/09 can't find SATA disk

  - by anon

  We need to run standard Solaris 10 on a few development servers (Dell 530s) because we can't get a commercial application running on OpenSolaris (we're still trying). However, we are finding that sometimes when Solaris 10 goes to do the install, after setup screens, it can't find the SATA drive. We tried the BIOS setting described here: BigAdmin On some Dells 530s, Solaris GA installs fine, but on others it doesn't. OpenSolaris always installs. Is there some way we can determine (eg. installing OpenSolaris and examining the SATA driver used) what OpenSolaris detected and use some option or driver from it to get Solaris 10 installed on our development Dell servers?

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• What is a "good" tool to password-protect .pdf files?

  - by Marius Hofert

  What is a "good" tool to encrypt (password protect) .pdf files? (without being required to buy additional software; the protection can be created under linux but the password query should work on Windows, too) I know that zip can do it: zip zipfile_name_without_ending -e files_to_encrypt.foo What I don't like about this is that for a single file, you have to use Winzip to open the zip and then click the file again. I rather would like to be prompted for a password when opening the .pdf (single file case). I know that pdftk can do this: pdftk foo.pdf output foo_protected.pdf user_pw mypassword. The problem here is that the password is displayed in the terminal -- even if you use ... user_pw PROMPT. But in the end you get a password-protected .pdf and you are prompted for the password when opening the file.

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• Is there an encrypted write-only file system for Linux?

  - by Grumbel

  I am searching for an encrypted file system for Linux that can be mounted in a write-only mode, by that I mean you should be able to write/append files, but not be able to read the files you have written. Access to the files should only be given when the filesystem is mounted via a password. The purpose of this is to write log files and such, without having the log files themselves be accessible. Does such a thing exist on Linux? Or if not, what would be the best alternative to create encrypted log files? My current workaround consists of simply piping the data through gpg --encrypt, which works, but is very cumbersome, as you can't get easy access to the file system as a whole, you have to pipe each file through gpg --decrypt manually.

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• Access a windows dynamic hard drive through a virtual machine on ubuntu?

  - by Enigma

  I have a Windows 7 OS and am thinking about transitioning to a dual boot set up with Ubuntu 12.04. From what I recall, it is not possible to natively access Dynamic Windows Partitions in a Linux OS. My thought is that it might be possible to have a virtual machine (running windows) installed within Ubuntu access the physical dynamic drive. The problem comes to whether VMWare can access the physical disk "high enough" to be able to mount it within the windows virtual machine as a native device or if it gets passed through from the native Linux OS. This is really the only thing holding me back from switching to a dual-boot set up as the dynamic disk is made up of 4 or 5 hard drives and I would very much like access to the data on both OS's. Alternatively, is there another solution for combining multiple physical hard drives into one virtual hard drive that would be readable on both OS's?

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• backing up ntfs disk using rsync on ubuntu

  - by user70366

  For a long time I was using windows. I have a separate drive I use to keep copies of my media files, photos etc. on, which I periodically backup to an external drive. In Windows I used SyncToy to do this. After my Windows stopped booting, I decided to switch to Linux (Ubuntu 10.10). That seems to be going fine, but now I want to backup my drive to the external drive like before. Mostly the two drives will be already the same with maybe about 10GB of extra files added. So I try to use rsync to synchronise the two drives like this: rsync --dry-run -rvlt --modify-window=1 /media/Antonio1TB/Backup /media/FREECOM\ HDD/Backup The problem is the dry run indicates that every file on the drive will be copied. Not just the files I have recently added. What is the correct command to synch two NTFS drives under Ubuntu so that files that already exist don't get copied again? Thanks.

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• saving and searching encrypted mail

  - by user53616

  I often send and receive gpg-encrypted mail. At the moment I use thunderbird + enigmail (in linux) to do that. As far as I know there is no way in thunderbird to find all encrypted messages which bodies contain particular keywords. There also seems to be no option to save encrypted mails decrypted (so they would be searchable). However for me it is important to be able to search old encrypted mails. So my question is: Is there a way in linux to save incoming mails automatically decrypted in my inbox and save outgoing encrypted mail decrypted in the send folder? Both times adding a line to the body which remarks that the mail was encrypted. It could be another email client for linux that could to that or perhaps a solution using procmail or maildrop. For a procmail solution I guess there could be some problems with encoding (perhaps one have to use emil?). Note that the solution should work for multipart encrypted messages (including encrypted attachments) too. Further note that I don't want a discussion about security holes. For me it's ok if messages are stored decrypted on my harddrive (which is encrypted as a whole anyway). In doubt for a first solution it would be ok to store my private key passphrase in cleartext on my harddrive, too. The point is that the mails are encrypted on the mailserver or more generally on their "way through the net".

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• How do I log file system read/writes by filename in Linux?

  - by Casey

  I'm looking for a simple method that will log file system operations. It should display the name of the file being accessed or modified. I'm familiar with powertop, and it appears this works to an extent, in so much that it show the user files that were written to. Is there any other utilities that support this feature. Some of my findings: powertop: best for write access logging, but more focused on CPU activity iotop: shows real time disk access by process, but not file name lsof: shows the open files per process, but not real time file access iostat: shows the real time I/O performance of disk/arrays but does not indicate file or process

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• Encrypted partitions with redundancy on ubuntu server

  - by Flamewires

  Hey I have to make a file system with an encrypted partition with on ubuntu server. something like Unencrypted: / - 10 GB /home - 10GB /var - 5GB -------------- Encrypted: /opt - 50GB This I can figure out in the setup, just partition as normal, setup /tmp as a encrypted volume with dm-crypt. However im not sure how to mirror this entire drive, so that if either failed i could still boot. and how will that affect the encrypted partition. Any help would be appreciated.

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• Is possible to encrypt only selected files with TrueCrypt?

  - by eKek0

  I have a pen drive with some folders in it's root. I want to encrypt all of them except one. Is possible to do this with TrueCrypt? Maybe this is not the right tool for this task, but I don't know any other.

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• Disk operations in windows 7 are slow

  - by Skadlig

  My computer started lagging last Sunday. I tried to reboot it and it failed. Trying to boot into failsafe mode takes around two hours. It mainly freezes on two files: scsiport.sys and classpnp.sys When it finally has started all disc operations are really slow. When it has run for a while it goes faster, probably due to data moved into RAM instead. It froze on an other file before that was associated with Avast but uninstalling it didn't really help. A critical windows update was installed on Sunday but rolling back the update didn't help. I had a guess about the sound card but disabling the sound card drivers also didn’t help. I have an inkling of an idea that it might be Intel rapid storage technology that might be acting up but it doesn't allow me to reinstall it from failsafe mode and I haven't been able to log into normal mode for a while. I would appreciate suggestions regarding how to get into normal mode again and/or what can be the root cause.

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• How to accelerate and notice failure of potentially faulty disks

  - by rainier

  Hey, I got a bunch of 'used' servers, whose disks should have been checked, but they have been shipped around the county in crate which can't help. I just had one disk go bad (despite being mirrored, currently trying to get more details). The server was fine for about a week before everything ground to a halt this afternoon. Is there any way 'accelerate' the failure of faulty disks, with the goal of bringing the disk to failure before we launch production services? Would doing lots of I/O with 'dd' or 'iozone' be a good way to test these potentially faulty disks? Any other tests/tools that would help recognized failures before they happen?

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• Exchange: encrypted mail database?

  - by Matt

  For an Microsoft Exchange server, is it possible to encrypt the email database such that the sysadmin cannot see the emails? In other words, the admin would be responsible for all aspects of running the Windows server and Exchange process, but would not be able to see the contents of any one email (except those sent to him, obviously). Only another individual (e.g. company owner) would be able to see all emails contained in the database.

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• slow disk writes between host and guest

  - by Jure1873

  I've got a ubuntu (server kernel) on a amd x4, 4gb ram, 2x seagate sata 1 tb disks for testing virtual machines and the write performance is very slow. The two disks are in a software raid1 array, one small boot ext3 partition, 10gb system partition and the rest is a xfs partition (about 980) gb for data (virtual machines). If I'm copying files from the virtual machine to the host with rsync or scp the copy frequently stalls or goes at about 1mb/s. What's wrong? I've tried disabling barriers on xfs, increased logbufs, allocsize, but it seems nothing helps. The strange thing is that await (for example during copying) for sda is usually under 100, while for sdb is around 400. Any ideas on what could be wrong / what could I do to improve this setup?

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