From owner-freebsd-current  Tue Mar 28 23: 4:34 2000
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Date: Wed, 29 Mar 2000 09:03:48 +0200 (CEST)
From: Leif Neland <leifn@neland.dk>
Cc: Warner Losh <imp@village.org>, current@FreeBSD.ORG
Subject: Re: Reading from bad disk ?
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> It seems Warner Losh wrote:
...
> > mount it in front of the drive to get it to run at  a reasonable
> > temperature.  W/o the fan, it was running at 58C or so.  With the fan
> > it runs at 39C or so.  I've included the script that I use to find
> > this information out.  Ken Merry sent it to me.  It works on some IBM
> > drives.
> > 
> > Warner
> > 
> > #!/bin/sh
> > 
> > TEMPC=`camcontrol cmd -v -n da -u 0 -c "4D 0 76 0 0 0 0 0 20 0" -i 32 "s9 i1"`
> > 
> > TEMPF=`echo " 2 k $TEMPC 9 * 5 / 32 + p" | dc`
> > 
> > echo "The temperature is: $TEMPF F $TEMPC C"
> 
Tried this:
#!/bin/sh
 
TEMPC=`camcontrol cmd -v -n da -u 2 -c "4D 0 76 0 0 0 0 0 20 0" -i 32 "s9 i1"`
TEMPF=`echo " 2 k $TEMPC 9 * 5 / 32 + p" | dc`
echo "The temperature is: $TEMPF F $TEMPC C"

I.e. replaced -u 0 with -u 2, because unit 2 is an IBM:

ncr0: <ncr 53c810 fast10 scsi> port 0xd100-0xd1ff mem 0x20000000-0x200000ff irq 11 at device 1.0 on pci0
ncr0: driver is using old-style compatability shims
da1 at ncr0 bus 0 target 1 lun 0
da0 at ncr0 bus 0 target 0 lun 0
da2 at ncr0 bus 0 target 2 lun 0
da2: <IBM DCAS-34330 S65A> Fixed Direct Access SCSI-2 device 
da2: 10.000MB/s transfers (10.000MHz, offset 8)
da2: 4134MB (8467200 512 byte sectors: 255H 63S/T 527C)

But I get this:

camcontrol: error sending command
(pass2:ncr0:0:2:0): LOG SENSE. CDB: 4d 0 76 0 0 0 0 0 20 0 
(pass2:ncr0:0:2:0): ILLEGAL REQUEST asc:24,0
(pass2:ncr0:0:2:0): Invalid field in CDB
dc: stack empty
The temperature is: 33.80 F  C

Does this simply mean this drive does not support temperature measurement,
or should something more be changed to use dev da2 instead of da0?

I'm running a week or so old current.

Leif



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