Date: Fri, 23 Jan 2004 12:22:29 +0000 From: Simon Waters <simonw@zynet.net> To: aic7xxx@freebsd.org Subject: Newbie: What's this mean please. Message-ID: <200401231222.i0NCMUt02109@h69.zynet2.co.uk>
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Just examining a test box I inherited with 2 identical SCSI disks ID0 and ID6
Atlas Quantum v9's, on a 2940UW controllers.
Notice that "Goal" and "Curr" for ID6 are 20MB/s not the 40MB/s for ID0.
All the other settings everywhere I can find them (i.e. SCSIselect) seem to
be identical.
Is this something to do with the controller hardware (if we still have
documentation here it is hiding). Silly configuration choice. Confusion
through meaningless numbers?
Notes: Debian 2.4.18 custom kernel (compiles in raid1 (and others), scsi,
aic7xxx to avoid mysteries of initrd and modules with mirroring - but I think
it did this before I touched it when it was running Redhat 7mumble), disks
are a mirrored pair with 2 partitions / and swap. Running hdparm spits out
"invalidate: busy buffer" a few times, and I've seem some other warnings, but
these seem to
Pointers to where I should have read first more than welcome.
I/O performance according to the tools I've tried isn't great, but then I'm
not really sure how old all this hardware is, or what it should be able to do.
Simon
Adaptec AIC7xxx driver version: 6.2.4
aic7880: Ultra Wide Channel A, SCSI Id=7, 16/253 SCBs
Channel A Target 0 Negotiation Settings
User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
Goal: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
Curr: 40.000MB/s transfers (20.000MHz, offset 8, 16bit)
Channel A Target 0 Lun 0 Settings
Commands Queued 1853
Commands Active 0
Command Openings 253
Max Tagged Openings 253
Device Queue Frozen Count 0
Channel A Target 1 Negotiation Settings
User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
Channel A Target 2 Negotiation Settings
User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
Channel A Target 3 Negotiation Settings
User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
Channel A Target 4 Negotiation Settings
User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
Channel A Target 5 Negotiation Settings
User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
Channel A Target 6 Negotiation Settings
User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
Goal: 20.000MB/s transfers (20.000MHz, offset 8)
Curr: 20.000MB/s transfers (20.000MHz, offset 8)
Channel A Target 6 Lun 0 Settings
Commands Queued 1797
Commands Active 0
Command Openings 253
Max Tagged Openings 253
Device Queue Frozen Count 0
Channel A Target 7 Negotiation Settings
User: 40.000MB/s transfers (20.000MHz, offset 255, 16bit)
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