Networker

Re: [Networker] R: [Networker] Red Hat Adaptec driver

2005-04-08 03:22:24
Subject: Re: [Networker] R: [Networker] Red Hat Adaptec driver
From: Dylan Vanderhoof <DylanV AT SEMAPHORE DOT COM>
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Date: Fri, 8 Apr 2005 00:19:20 -0700
Something else you might try, linux's st buffers are abysmally small by default 
and caused me no end of issues with my Scalar 1000 until I set them to 
something larger.

The file that'll do this is /etc/modules.conf.  Mine looks like the follwing:

[[email protected] /etc]$ cat modules.conf
alias scsi_hostadapter aic7xxx
options st buffer_kbs=128

90% of the issues I was having were eliminated by adding the buffer_kbs line.

-Dylan Vanderhoof
Semaphore Corporation


-----Original Message-----
From: Antonio Ettorre [mailto:vot4anto AT GMAIL DOT COM]
Sent: Friday, April 08, 2005 12:00 AM
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: [Networker] R: [Networker] Red Hat Adaptec driver


About this issue maybe can help you the following:

With 2.4.29 being the latest (and most stable) stable kernel, we have to
wonder why so many major distros are still shipping with 2.4.21 or 2.4.22
kernels.

At this point, all we can offer is this: if you are using SCSI tape drives
under Linux with a 2.4 kernel, the use of a kernel prior to 2.4.24 will
result in SCSI errors and failed tape I/O operations. This has been tested
with tar, cpio, dd, and afio with the same results - 2.4.23 and earlier
kernels still have serious SCSI tape I/O flaws that will affect your backups
(and more importantly, your restores).

For a quick step-by-step guide in Linux Kernel building, visit: Adding a
secondary kernel to your Linux system

Additionally, folks using Adaptec controllers should be aware that the
aic7xxx_old driver is actually more stable for use with tape drives than the
default aic7xxx driver. If you are receiving SCSI errors under 2.4.24+,
please try using the aic7xxx_old driver. Other options include replacing the
Adaptec controller with an Advansys if you only require Ultra Wide
connectivity, or an ATTO Technologies UL3S for Ultra 160 performance. For
most single tape drive scenarios, the Advansys or similar Symbios-based card
will work fine, but for multiple tape drive configurations, configurations
that include LTO-2, LTO-3, AIT-4, SAIT, or SDLT drives, the Ultra 160 ATTO
UL3S is the better solution.

That you can find at follow: http://www.linuxtapecert.org/

-----Messaggio originale-----
Da: Legato NetWorker discussion [mailto:NETWORKER AT LISTSERV.TEMPLE DOT EDU] 
Per
conto di Carl Bergmann
Inviato: giovedì 7 aprile 2005 8.59
A: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Oggetto: Re: [Networker] Red Hat Adaptec driver

I'v used the 6.3.9 driver from adaptec for 3 months now. Most scsi-bus
reset and errors (that I hav with 6.2.36) has gone. Another thing to do
is to disable CDI on the jukebox-devices.
You can download the source-code for the 6.3.9 driver from adaptec and
the make the driver to the latest kernel (I.m running RHEL Es. V3u4
kernel 2.4.21-27.Elsmp). Remember to make a new initrd image otherwise
you will get the old driver at boot.
P.s. You can also ger the source-code for 2.6 kernel so you are able to
run on RHEL ESv4
Carl Bergmann
Risoe Nat. Lab
DK

-----Original Message-----
From: Dave Mussulman [mailto:mussulma AT CS.UIUC DOT EDU] 
Sent: 6. april 2005 18:43
To: NETWORKER AT LISTSERV.TEMPLE DOT EDU
Subject: Re: [Networker] Red Hat Adaptec driver


On Tue, Apr 05, 2005 at 09:05:06AM -0600, Librado Pamintuan wrote:
> Hello all,
> 
> The new driver for the Adapter 39160 (v6.3.9) is now available on 
> Adaptec website. There are several rpm package available for various 
> release of Red Hat.
> 
> Question is:
> Did someone already used and applied this driver? are there any 
> improvement or does it poses new problems/errors?
> 
> In particular, I'm running Red Hat ES 3 on Linux O/S (Intel server), 
> Legato NetWorker v7.1.2

There were some recent posts (maybe January 2005?) about this driver.
I'm running it in the same environment and versions as you, and am not
having any problems.  The latest kernel it supports is 2.4.21-4, which
is not the latest available, but it works.

I was having problems with the adaptec driver that ships with RHEL AS 3
-- timeouts and bus errors.  When I upgraded to the 6.3.9 version, my
problems went away.

Dave

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