DaemonForums  

Go Back   DaemonForums > FreeBSD > FreeBSD General

FreeBSD General Other questions regarding FreeBSD which do not fit in any of the categories below.

Reply
 
Thread Tools Display Modes
  #1   (View Single Post)  
Old 10th May 2008
Foon Foon is offline
New User
 
Join Date: May 2008
Posts: 1
Default Filesystem read errors

Hi,

I'm hoping someone can help me debug some intermittent read errors I'm seeing? If I read a 2Gb file from disk multiple times I see a corrupt block about once every 10Gb - damned if I can figure out why.

My setup:
11 x 500Gb drives in a hardware RAID-5 array
U160 SCSI connection from the RAID to an Adaptec 39160 HBA
The RAID array appears in 2Tb slices across SCSI, so gvinum to glue it back together:
Code:
# gvinum l
3 drives:
D d1                    State: up       /dev/da0s1a     A: 0/2097141 MB (0%)
D d2                    State: up       /dev/da1s1a     A: 0/2097141 MB (0%)
D d3                    State: up       /dev/da2s1a     A: 0/575053 MB (0%)

1 volume:
V storage               State: up       Plexes:       1 Size:       4657 GB

1 plex:
P storage.p0          C State: up       Subdisks:     3 Size:       4657 GB

3 subdisks:
S storage.p0.s0         State: up       D: d1           Size:       2047 GB
S storage.p0.s1         State: up       D: d2           Size:       2047 GB
S storage.p0.s2         State: up       D: d3           Size:        561 GB
#
Have to admit it took me a while to get all this working (I'm far from a BSD guru), so I'm kinda lost how to debug it - how do I go about figuring out which side of the SCSI cable the fault is on?

As a (possibly) simpler solution, is there a way I can tell the filesystem to validate checksums when it reads a block from disk and re-read if the checksum fails?

Cheers!
Reply With Quote
Reply

Thread Tools
Display Modes

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 On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
A Brief History of the BSD Fast Filesystem, Kirk McKusick ai-danno Off-Topic 0 9th March 2009 05:59 AM
Mount filesystem with a regular user ivanatora FreeBSD General 15 30th July 2008 08:51 AM
dvd filesystem type chill FreeBSD General 6 17th June 2008 08:22 AM
acessing the root filesystem kernel module! rayden FreeBSD General 1 11th June 2008 06:48 PM
Best Filesystem thavinci FreeBSD General 25 29th May 2008 03:32 PM


All times are GMT. The time now is 02:05 PM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Content copyright © 2007-2010, the authors
Daemon image copyright ©1988, Marshall Kirk McKusick