Date: Thu, 20 Jul 2000 14:43:28 -0500 (CDT) From: Steven Timm <timm@fnal.gov> To: aic7xxx@freebsd.org Subject: Ultra160 SCSI vs. RedHat 6.1 kernel 2.2.14 Message-ID: <Pine.LNX.4.21.0007201431270.27331-100000@sapphire.fnal.gov>
next in thread | raw e-mail | index | archive | help
Greetings all:
I have the following configuration:
Dell Poweredge 2450 2x600EB Pentium III
Adaptec AIC-7899 Ultra 160/m SCSI host adapter
1x9Gb and 2x18GB Seagate Cheetah disks (10000 RPM)
Red Hat Linux 6.1, Kernel 2.2.14-3smp
conf.modules as installed by dell reads:
alias eth0 eepro100
alias scsi_hostadapter aic7xxx
alias parport_lowlevel parport_pc
----------------------------------------------
The problem is the following:
Using a simple utility we call "bonnie", which first writes
and then reads a 1 GB file from each disk, I have observed
that the write speeds are only about 2 MB/sec. Read speeds are OK
at about 20 MB/sec.
I have tried to put in options like aic7xxx=ultra
and it only made it worse.
Steve Timm
----------------------------------------------------
The output from dmesg follows below:
(scsi0) <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> found at PCI 4/0
(scsi0) Wide Channel A, SCSI ID=7, 32/255 SCBs
(scsi0) Downloading sequencer code... 385 instructions downloaded
(scsi1) <Adaptec AIC-7899 Ultra 160/m SCSI host adapter> found at PCI 4/1
(scsi1) Wide Channel B, SCSI ID=7, 32/255 SCBs
(scsi1) Downloading sequencer code... 385 instructions downloaded
scsi0 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.23/3.2.4
<Adaptec AIC-7899 Ultra 160/m SCSI host adapter>
scsi1 : Adaptec AHA274x/284x/294x (EISA/VLB/PCI-Fast SCSI) 5.1.23/3.2.4
<Adaptec AIC-7899 Ultra 160/m SCSI host adapter>
scsi : 2 hosts.
(scsi0:0:0:0) Synchronous at 160.0 Mbyte/sec, offset 63.
Vendor: SEAGATE Model: ST39204LC Rev: 0002
Type: Direct-Access ANSI SCSI revision: 03
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
(scsi0:0:1:0) Synchronous at 160.0 Mbyte/sec, offset 63.
Vendor: SEAGATE Model: ST318404LC Rev: 0005
Type: Direct-Access ANSI SCSI revision: 03
Detected scsi disk sdb at scsi0, channel 0, id 1, lun 0
(scsi0:0:2:0) Synchronous at 160.0 Mbyte/sec, offset 63.
Vendor: SEAGATE Model: ST318404LC Rev: 0005
Type: Direct-Access ANSI SCSI revision: 03
Detected scsi disk sdc at scsi0, channel 0, id 2, lun 0
Vendor: DELL Model: 1x4 U2W SCSI BP Rev: 1.15
Type: Processor ANSI SCSI revision: 02
SCSI device sda: hdwr sector= 512 bytes. Sectors= 17783239 [8683 MB] [8.7 GB]
sda: sda1 sda2 < sda5 sda6 >
SCSI device sdb: hdwr sector= 512 bytes. Sectors= 35566478 [17366 MB] [17.4 GB]
sdb: sdb1
SCSI device sdc: hdwr sector= 512 bytes. Sectors= 35566478 [17366 MB] [17.4 GB]
sdc: sdc1
autodetecting RAID arrays
------------------------------------------------------------------
Steven C. Timm (630) 840-8525 timm@fnal.gov http://home.fnal.gov/~timm/
Fermilab Computing Division/Operating Systems Support
Central Systems Support Group--Computing Farms Operations
To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe aic7xxx" in the body of the message
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?Pine.LNX.4.21.0007201431270.27331-100000>