 | | SOLVED: aacraid driver in RHEL3 U4 doesn 't work when Raid 1 array
is not optim | SOLVED: aacraid driver in RHEL3 U4 doesn 't work when Raid 1 array
is not optim 2005-01-21 - By Tommy Davis
Back
Hi,
The aacraid driver in RHEL3 U4 have problems with RAID arrays that are not
optimal. Read on for a solution and some bits about the performance and
monitoring of Adaptec 2130SLP RAID controller.
Last week we got a couple of servers built upon Intel Jarrell SE7520JR2
serverboards and Adaptec 2130SLP Raid controllers. Two RAID 1 arrays were
configured in each server
After initializing the arrays, I proceeded to install RHEL. While the array was
building the installer would consistently freeze the machine soon after
anaconda
was started.
When the arrays were finished being built, RHEL3 installed fine. To test the
array I pulled out a disk when the server was running normally. It immediately
became unresposive (no network either) and continually printed the following
message on the screen:
Queue 6 full, 0 outstanding
Queue 6 full, 0 outstanding
Queue 6 full, 0 outstanding
Queue 6 full, 0 outstanding
..... . ..... . ...........
After a hard reset the machine booted fine, but the same thing as described
above happened just after the login prompt was shown. No messages were written
to the syslog regardin the crash.
When the array was rebuilt, everything worked again, and the server ran without
problems.
After trying to pinpoint the problem I downloaded version 1.1.5-2371 of the
driver from www.adaptec.com and rebuilt the kernel + module. The new driver
works as expected and faulty disks doesn't bring down the server and can be
replaced without taking down the server.
Monitoring og Adaptec 2130SLP
=============================
Regarding monitoring of the raid status, the included aaccli command line
utility works fine. You can control most aspects of the controller and script
it
nicely. Ex:
[]# aaccli open aac0 : container list /full=true
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---
----
Adaptec SATA/SCSI RAID Controller Command Line Interface
Copyright 1998-2004 Adaptec, Inc. All rights reserved
-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- --
Executing: open "aac0"
Executing: container list /full=TRUE
Num Total Oth Stripe Scsi Partition
Creation
Label Type Size Ctr Size Usage C:ID:L Offset:Size State RO Lk
Task Done% Ent Date Time
-- -- -- --- -- --- --- -- --- -- ---- -- --- -- ---- ----- -- ---- -- --
-- ---- -- --- --- -- --- -- -----
0 Mirror 34.1GB Open 0:00:0 64.0KB:34.1GB Normal
0 011705 19:51:06
/dev/sda Array 1 0:01:0 64.0KB:34.1GB Normal
1 011705 19:51:06
1 Mirror 34.1GB Open 0:03:0 64.0KB:34.1GB Normal
0 011705 19:52:29
/dev/sdb Array 2 0:02:0 64.0KB:34.1GB Normal
1 011705 19:52:29
Performance og Adaptec 2130SLP
==============================
Performancewise the controller performs well with our applications. hdparm
reports the following:
[]# hdparm -tT /dev/sdb
/dev/sdb:
Timing buffer-cache reads: 2824 MB in 2.00 seconds = 1412.00 MB/sec
Timing buffered disk reads: 124 MB in 3.00 seconds = 41.33 MB/sec
How that does compare to other setups I don't know, but I would be interested
to
find out.
--
Med venlig hilsen
-Toem
Tommy Davis, Technical Director
Adapt A/S, Havnegade 41, 2. sal, 1058 K?benhavn K
Tel +45 3341 1050, Fax +45 3341 1069, http://www.adapt.dk/
--
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