I'm running 2-2-15.pre18 with the 2.2.14 raid patches with no problem. I
was running an 2940U2W and have just recently upgraded to an Ultra 160.
I've been running with the 2940 then the Ultra 160 in this mode for two
months with no lockups. RAID will stress the hell out of the SCSI bus and
find incompabitilities for you that won't occur on non-RAID systems.
#1 - To see if you have a hardware problem drop all your devices to ASYNC
mode in the BIOS.
If this works you probably have a cabling issue or device compatibility
problem. This happened to me and I had to replace my LVD cable and move my
tape drive to a seperate bus.
#2 - You don't say what your total SCSI config is what does
/proc/scsi/aic7xxx/?? look like -- I moved my tape drive to channel B and my
Seagate's now run at 80Mb with NO problems...but they are the only thing on
the LVD bus.
#3 - Make sure you the card isn't sharing an IRQ with something else (cat
/proc/interrupts)
#4 - If you're not running in LVD mode than your cabling becomes a HUGE
issue. I haven't figured out a way yet to tell what mode it's in. What are
your total cable lengths (both internal and external on each bus)?
Here's what my Ultra 160 looks like now (rock solid):
Adaptec AIC7xxx driver version: 5.1.28/3.2.4
Adapter Configuration:
SCSI Adapter: Adaptec AIC-7880 Ultra SCSI host adapter
Ultra Wide Controller at PCI 0/11/0
(scsi1:0:8:0)
Device using Wide/Sync transfers at 80.0 MByte/sec, offset 15
(scsi1:0:9:0)
Device using Wide/Sync transfers at 80.0 MByte/sec, offset 15
(scsi1:0:10:0)
Device using Wide/Sync transfers at 80.0 MByte/sec, offset 15
(scsi2:0:3:0)
Device using Wide/Sync transfers at 20.0 MByte/sec, offset 15
Host: scsi1 Channel: 00 Id: 08 Lun: 00
Vendor: SEAGATE Model: ST150176LC Rev: 0001
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 09 Lun: 00
Vendor: SEAGATE Model: ST150176LC Rev: 0001
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 10 Lun: 00
Vendor: SEAGATE Model: ST150176LC Rev: 0001
Type: Direct-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 03 Lun: 00
Vendor: SEAGATE Model: AIT Rev: 04j6
Type: Sequential-Access ANSI SCSI revision: 02
________________________________________
Michael D. Black Principal Engineer
[EMAIL PROTECTED] 321-676-2923,x203
http://www.csihq.com Computer Science Innovations
http://www.csihq.com/~mike My home page
FAX 321-676-2355
----- Original Message -----
From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Tuesday, April 18, 2000 12:31 PM
Subject: adaptec 2940u2w hangups
Hi All!
Lately, we have been experiencing some serious problems with our Linux
servers
using RAID0 on Adaptec 2940U2W. The machines, which are under quite some
load,
suddenly dies and must be cold-restarted. When they get back online again,
there's is no sign of anything going awry in any logfile. The just plunge
into
deep-freeze, zero-Kelvin mode. *argh*
Currently, the machines are running Linux 2.2.14 with latest raid-patches
(Mingo's raid-2.2.14-B1-patch), but we've seen the problem under 2.2.13 as
well.
As I said, there's nothing in the log files that would indicate what's
wrong.
Installing the software watchdog kernel module/watchdogd didn't help either.
The situation is getting somewhat embarrassing, as we've been pushing pretty
hard towards Linux. We're considering moving all servers to non-RAID
configurations, but we'd really prefer RAID0.
I've also noticed a few other postings about problems/hangups with
2940/AIC79xx
on Linux RAID, so it seems we're not alone with this problem.
Does anyone have any kind of information as to the status of this. Is the
bug(s) identified? Is there a solution (other than stop using RAID)?
Hardware setup: RH Linux 6.1/2.2.14/raid-2.2.14-B1 on dual PIII motherboards
(ASUS P2B-DS) and U2W SCSI IBM disks, 512+ MB RAM.
/m
