Date: Tue, 18 May 2004 20:58:47 +0200 From: Jens Schweikhardt <schweikh@schweikhardt.net> To: "Justin T. Gibbs" <gibbs@scsiguy.com> Cc: freebsd-scsi@freebsd.org Subject: Re: 2120S Stripe - abysmal performance Message-ID: <20040518185847.GA3514@schweikhardt.net> In-Reply-To: <2991245408.1084458741@aslan.scsiguy.com> References: <FE045D4D9F7AED4CBFF1B3B813C85337051D8C0D@mail.sandvine.com> <40A26356.409@freebsd.org> <20040512183231.GB3137@schweikhardt.net> <20040512190429.GA1315@schweikhardt.net> <40A27607.9040801@freebsd.org> <20040512191949.GA1016@schweikhardt.net> <2991245408.1084458741@aslan.scsiguy.com>
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On Thu, May 13, 2004 at 08:32:21AM -0600, Justin T. Gibbs wrote:
# > On Wed, May 12, 2004 at 01:07:51PM -0600, Scott Long wrote:
# > ...
# ># Something on the SCSI bus is very unhappy. What drives are they? What
# ># firmware rev?
# >
# > 2 Fujitsu MAP3367NP with fw 0105. They've been working for a year
# > on my 29160 without a hitch.
#
# At U320 speeds, I believe you need 0107 or better to have these
# drives work. You should contact Fujitsu to ensure you have the
# latest firmware.
Okay, I contacted Fujitsu and now I have 0108 on both MAPs (quick answer
from their German web support mail form, thanks Fujitsu!). Indeed my
SCSI bus appears happy now. No more resets or other errors. I configured
all IDs for U320 again.
However, configuring a RAID 0 with both MAPs on the 2120S as the only
drives still gives a sustained read rate of 65MB/s (constant over the
whole stripe), while a single drive on the 29160 peaks at just over
70MB/s and drops to 40 at the inner cyls. I played around with the read
cache, which has NO effect (unlike Scott explained elsethread). I also
tried the TUNING tips from aac(4), e.g. hw.aac.iosize_max=96*1024 in
/boot/loader.conf, also no noticeable change in performance.
Should the 2120S be able to deliver more? With a vinum stripe I get
100MB/s. This is on a system with only 33MHz/32bit PCI (Asus A7N8X), and
both of 29160 and 2120S. Somehow I get a feeling I'm hitting some limit
that's just half the theoretical PCI bandwith of 133MB/s. Should I remove
the 29160 (with just a slow CDROM) and try again?
Is an update in order for the controller?
AAC0> controller details
Executing: controller details
Controller Information
----------------------
Remote Computer: S
Device Name: S
Controller Type: No Info
Access Mode: READ-WRITE
Controller Serial Number: Last Six Digits = BA12C0
Number of Buses: 1
Devices per Bus: 15
Controller CPU: i960 R series
Controller CPU Speed: 100 Mhz
Controller Memory: 64 Mbytes
Battery State: Not Present
Component Revisions
-------------------
CLI: 1.0-0 (Build #5263)
API: 1.0-0 (Build #5263)
Miniport Driver: 4.0-0 (Build #6011)
Controller Software: 4.0-0 (Build #6011)
Controller BIOS: 4.0-0 (Build #6011)
Controller Firmware: (Build #6011)
Controller Hardware: 2.64
Regards,
Jens
--
Jens Schweikhardt http://www.schweikhardt.net/
SIGSIG -- signature too long (core dumped)
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