I have an hp t20i attached to linux mandrake 6.0 kernel 2.2.9.
The tape drive appears to work. However it wont accept any change in
blocksize other than 512.
setblk 0 gives Illegal bits in request field
setblk 512 works
setblk 1024 or more gets illegal block size.
So I looked on the HP website for a scsi programming manual and couldn't find
one.
Then I called HP support (not). I explained that I wanted to write a driver
for linux and wanted to purchase the SCSI interface programming manual.
After a few minutes on hold he came back and said NO-WAY! Apparently the SCSI
interface is a top secret, classified, technological advantage for HP and I
must be some kind of industrial spy.
So HP is not interested in supporting us. I will return their $500 tape
drive.
Beware....
"Ryan C. Sumner" wrote:
> Hi,
>
> I've installed a HP-T20 into one of my linux machines and it doesn't seem
> to be working correctly.
>
> I can see in the /proc/scsi/scsi the following, which tells me that the
> drive is loaded:
>
> Attached devices:
> Host: scsi0 Channel: 00 Id: 00 Lun: 00
> Vendor: IBM Model: DDRS-39130D Rev: DC1B
> Type: Direct-Access ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 01 Lun: 00
> Vendor: IBM Model: DDRS-39130D Rev: DC1B
> Type: Direct-Access ANSI SCSI revision: 02
> Host: scsi0 Channel: 00 Id: 04 Lun: 00
> Vendor: HP Model: T20 Rev: 3.01
> Type: Sequential-Access ANSI SCSI revision: 02
>
> And when I create the block devices by running:
>
> mknod -m 660 /dev/st0 c 9 0
> mknod -m 660 /dev/st1 c 9 1
> mknod -m 660 /dev/nst0 c 9 128
> mknod -m 660 /dev/nst1 c 9 129
>
> It comes back with no problems. But, when I run:
>
> # mt-f /dev/st0 status
> mt: /dev/st0: Operation not supported by device
>
> Or if I try to tar something to it, I get the same problem. Keep in mind
> that this drive was added after the OS was installed, but everything
> looks good. Kernel is 2.0.36 running on Debian 2.0.
>
> Any help would be greatly appreciated.
>
> Ryan C. Sumner
> Director of Technology
> LIS Consulting, LLC
