nothing is solved yet. i rebooted everything this morning to make sure the
scsi bus was cleared and reset. then i decided to try the individual btape
tests to see if i could isolate the issue. the fill test is running all day
still running:

16:23:27 Flush block, write EOF
Wrote blk_block=12325000, dev_blk_num=5000 VolBytes=795,110,335,488 
rate=38313.0 KB/s
Wrote blk_block=12330000, dev_blk_num=10000 VolBytes=795,432,895,488 
rate=38313.8 KB/s

i get the impression that the issue was with the read part of the btape test, i 
may
upgrade the mpt drivers for the LSI controller when this finishes as well. right
now they are version 3.x:

# cat /proc/mpt/version 
mptlinux-3.04.02
  Fusion MPT base driver
  Fusion MPT SPI host driver

and version 4.00.13.04-1-rhel5.x86_64 is available.

-- michael



On Tue, Oct 30, 2007 at 10:20:02PM +0200, Michael Lewinger wrote:
> Hi Michael,
> 
> So - what was the issue ? How was it solved ?
> 
> michael
> 
> On 10/30/07, Ralf Gross <[EMAIL PROTECTED]> wrote:
> >
> > Michael Galloway schrieb:
> > > Wrote blk_block=3465000, dev_blk_num=9000 VolBytes=223,534,015,488 rate=
> > 38171.8 KB/s
> > > Wrote blk_block=3470000, dev_blk_num=14000 VolBytes=223,856,575,488
> > rate=38194.3 KB/s
> > > Wrote blk_block=3475000, dev_blk_num=3500 VolBytes=224,179,135,488 rate=
> > 38184.1 KB/s
> > >
> > > 38MB/s is only around 140GB/hr. i'd expect a bit more from LTO-4.
> >
> > I get ~77 MB/s with a HP Ultrium LTP-4 drive during full backups and
> > spooling (write speed to tape).
> >
> > > > > target5:0:15: Beginning Domain Validation
> > > > > target5:0:15: Domain Validation skipping write tests
> > > > > target5:0:15: Ending Domain Validation
> > > > > target5:0:15: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 126)
> > > > > target5:0:15: Beginning Domain Validation
> > > > > target5:0:15: Domain Validation skipping write tests
> > > > > target5:0:15: Ending Domain Validation
> > > > > target5:0:15: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 126)
> > > > > target5:0:15: Beginning Domain Validation
> > > > > target5:0:15: Domain Validation skipping write tests
> > > > > target5:0:15: Ending Domain Validation
> > > > > target5:0:15: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 126)
> > > > > target5:0:15: Beginning Domain Validation
> > > > > target5:0:15: Domain Validation skipping write tests
> > > > > target5:0:15: Ending Domain Validation
> > > > > target5:0:15: FAST-80 WIDE SCSI 160.0 MB/s DT (12.5 ns, offset 126)
> >
> > I don't see the errors you get. But I also see "FAST-80 WIDE SCSI
> > 160.0 MB/s" mesages in my kernel log. The HP tool ltt reports U160
> > connections for both of my drives.  Altough the scsi controller's bios
> > claims during boot that the drives are connected with U320 and the
> > drives are capable of U320.
> >
> > After boot I checked the scsi paramters and it looks like 6.25 would be
> > the correct value for U320. But the HP tool still shows that the
> > drives are connected with U160.
> >
> > /sys/class/spi_transport/target5\:0\:1/min_period
> > 6.25
> >
> > Sorry for hijacking one half of your thread, but I would like to know
> > if anyone has seen a FAST-160 message in the kernel log with tape
> > drives.  Not that I could saturate a U160 connection, but I would like
> > to know why it's only connecting with U160 speed. An other LSI
> > controller which is used for a RAID devices shows the propper U320
> > (FAST-160) value during boot.
> >
> > Ralf
> >
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> 
> 
> 
> -- 
> Michael Lewinger
> MBR Computers
> http://mbrcomp.co.il

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