LinuxQuestions.org
Register a domain and help support LQ
Go Back   LinuxQuestions.org > Forums > Linux Forums > Linux - Hardware
User Name
Password
Linux - Hardware This forum is for Hardware issues.
Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?

Notices

Reply
 
Search this Thread
Old 02-16-2013, 11:45 AM   #1
Ulysses_
Member
 
Registered: Jul 2009
Posts: 647

Rep: Reputation: 42
Hard drive or SSD that always verifies data written?


This guy here says the O/S or driver (or firmware?) verifies every sector written to a hard drive. If verification fails, the sector is marked as bad.

However verification does not occur with video recording he says, because the drive is written to continuously.

Does any hardware exist, hard drive or solid state drive, that always verifies data written, and always writes to another sector when verification fails?
 
Old 02-16-2013, 03:49 PM   #2
jefro
Guru
 
Registered: Mar 2008
Posts: 11,969

Rep: Reputation: 1484Reputation: 1484Reputation: 1484Reputation: 1484Reputation: 1484Reputation: 1484Reputation: 1484Reputation: 1484Reputation: 1484Reputation: 1484
Some ssd's might be able to test the data it received and that is not fully what you want. You'd want to verify that some application did in fact write to the disk and was able to fully read it.


There used to be a switch in dos to verify after write. I get the feeling there was a similar switch in linux too. I can't find it just now.

From what I understand, a journaling system would be enough.


Maybe others have input on this.
 
1 members found this post helpful.
Old 02-17-2013, 08:03 AM   #3
Ulysses_
Member
 
Registered: Jul 2009
Posts: 647

Original Poster
Rep: Reputation: 42
Thanks, you helped me write better queries in google, and here is the answer, even better than just verify after write:

Use ZFS with the copies=2 option

http://en.wikipedia.org/wiki/ZFS

Or ZFS mirroring:

https://blogs.oracle.com/timc/entry/...s_self_healing

Would be nice if ext3 could do that. Anyone know how?

Last edited by Ulysses_; 02-17-2013 at 08:18 AM.
 
Old 02-17-2013, 08:34 AM   #4
syg00
LQ Veteran
 
Registered: Aug 2003
Location: Australia
Distribution: Lots ...
Posts: 12,446

Rep: Reputation: 1068Reputation: 1068Reputation: 1068Reputation: 1068Reputation: 1068Reputation: 1068Reputation: 1068Reputation: 1068
Not ext3, but look into btrfs. Not as comprehensive as ZFS, but should suffice.

BTW, you should close your parallel thread.
 
Old 02-17-2013, 12:42 PM   #5
Ulysses_
Member
 
Registered: Jul 2009
Posts: 647

Original Poster
Rep: Reputation: 42
Dunno how to close a thread. Maybe it's a mods-only feature.
 
  


Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
[SOLVED] transfer data from a SATA external hard drive to a IDE internal hard drive Cabtech Linux - Newbie 7 04-22-2012 03:55 PM
Catch all data being written to Hard Drives vzxen Linux - Newbie 20 07-27-2010 09:43 AM
crunchbang on asus eee won't install to ssd hard drive thehardcore8 Linux - Distributions 1 10-31-2009 10:57 AM
SSD Hard Drive and MySQL Fredde87 Linux - Hardware 3 07-13-2009 04:32 PM
Getting Data off old hard drive artemis Linux - Hardware 6 11-02-2002 02:06 PM


All times are GMT -5. The time now is 02:36 PM.

Main Menu
My LQ
Write for LQ
LinuxQuestions.org is looking for people interested in writing Editorials, Articles, Reviews, and more. If you'd like to contribute content, let us know.
Main Menu
Syndicate
RSS1  Latest Threads
RSS1  LQ News
Twitter: @linuxquestions
identi.ca: @linuxquestions
Facebook: linuxquestions Google+: linuxquestions
Open Source Consulting | Domain Registration