I rebuilt my home pc with 2 Quantum Atlas U160 disks and an Adaptec 29160N
pci scsi card for a new 9.1 install (and kicked out the last, much unused
win98 ide disk - but someone please write to me and tell me how to get 3d
games going with a Matrox G550 graphics card and promise me you're about to
port IL2 Sturmovik). I'm new to SCSI on i386.
Below is the bit of /var/log/boot.msg that seemed worrying (underlined with
carets). Web trawling came up with lots of people with similar messages, but
they all seemed to have big system problems - having pored over the logs, and
watched the system speed and stability, I don't seem to see anything else
reporting this issue, which again according to my web trawling appeared to be
to do with bus termination. There is a terminator on the blind end of the the
cable - there are the 2 disks, supposedly set to self-terminate, on the
other, and no other devices attached.
The only 'problem', if it is one, is that hdparm -t produces lower (just over
40Mb/s) read performance than the ide UDMA100 disks aboard (around 45MB/s).
Questions: does this output look 'normal' to scsi guys and gals?
What, if anything, is wrong?
What sort of values do you get for U160 setups from hdparm -t?
The machine 'feels' snappier than when I had ide system disks, but then I've
split it across 2 disks for the first time, so it's hard to know.
TIA
Fergus
<4>VFS: Mounted root (ext2 filesystem).
<5>SCSI subsystem initialized
<6>scsi0 : Adaptec AIC7XXX EISA/VLB/PCI SCSI HBA DRIVER, Rev 6.2.36
<4>
<4> aic7892: Ultra160 Wide Channel A, SCSI Id=7, 32/253 SCBs
<4>
<4>(scsi0:A:0): 160.000MB/s transfers (80.000MHz DT, offset 127, 16bit)
<4>(scsi0:A:0): 80.000MB/s transfers (40.000MHz DT, offset 127, 16bit)
<4>(scsi0:A:1): 160.000MB/s transfers (80.000MHz DT, offset 127, 16bit)
<4>(scsi0:A:1:0): Unexpected busfree in Data-out phase
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
<4>SEQADDR == 0x76
<4>(scsi0:A:1): 80.000MB/s transfers (40.000MHz DT, offset 127, 16bit)
<5> Vendor: QUANTUM Model: ATLAS10K2-TY092L Rev: DDD6
<5> Type: Direct-Access ANSI SCSI revision: 03
<4>scsi0:A:0:0: Tagged Queuing enabled. Depth 32
<5>SCSI device sda: 17938985 512-byte hdwr sectors (9185 MB)
<5>SCSI device sda: drive cache: write back
<6> sda: sda1 sda2 sda3 sda4
<5>Attached scsi disk sda at scsi0, channel 0, id 0, lun 0
<5> Vendor: QUANTUM Model: ATLAS10K2-TY092L Rev: DDD6
<5> Type: Direct-Access ANSI SCSI revision: 03
<4>scsi0:A:1:0: Tagged Queuing enabled. Depth 32
<5>SCSI device sdb: 17938985 512-byte hdwr sectors (9185 MB)
<5>SCSI device sdb: drive cache: write back
<6> sdb: sdb1 sdb2 sdb3 sdb4
<5>Attached scsi disk sdb at scsi0, channel 0, id 1, lun 0
<4>ppa: Version 2.07 (for Linux 2.4.x)
<5>ReiserFS: sda3: found reiserfs format "3.6" with standard journal
<5>ReiserFS: sda3: using ordered data mode
<4>reiserfs: using flush barriers
<5>ReiserFS: sda3: journal params: device sda3, size 8192, journal first block
18, max trans len 1024, max batch 900, max commit age 30, max trans age 30
<5>ReiserFS: sda3: checking transaction log (sda3)
<4>reiserfs: disabling flush barriers on sda3
<5>ReiserFS: sda3: Using r5 hash to sort names
<4>VFS: Mounted root (reiserfs filesystem) readonly.
<5>Trying to move old root to /initrd ... failed
<5>Unmounting old root
<5>Trying to free ramdisk memory ... okay
--
Fergus Wilde
Chetham's Library
Long Millgate
Manchester
M3 1SB
Tel: +44 161 834 7961
Fax: +44 161 839 5797
http://www.chethams.org.uk
