SUMMARY: Solaris8, HP DDS3, no hardware compression

From: Tim Carlson (
Date: Thu Nov 16 2000 - 17:05:30 CST

Original problem below..

This one was a real pain to track down. Turns out that a firmware upgrade
(done on a windows box) was what was needed. We were running at U608 and
U710 for firware revisions on the loaders with U812 being the most recent.
Upgraded the firmware and the drives are now happily compressing.. On a
side note, Solaris 8 does not require an st.conf file to explain the HP
DDS3 drives. Found this out by trial and error.

Nobody responded to my initial query. Of course I only got one "vacation"
message, which seems really low from past experience, so maybe there was a
problem with my post getting to the entire list.


> Just installed an E250 with Solaris 8 (lateset recommended patches).
> We had two HP DDS3 autoloaders installed on a Solaris 2.5.1 box (U 2170)
> that were working just fine. That is to say that we could put 20Gig on a
> DDS3 tape with no problem.
> Moved the tape drives to the E250, added an entry to
> /kernel/drv/st.conf, did a boot -r, and the drives showed up as
> /dev/rmt/0* and /dev/rmt/1*. Dumped a 10Gig UFS filesystem and it used up
> basically all of a tape. I have tried all versios of /dev/rmt/[01]* (c,
> bc, lbc, etc) and none of them allow the drive to do compression. Normally
> when the drive is doing the compression, the little LED on the unit tells
> you what the compression ratio is (eg "Write 1.5"). Now it just says
> "Write" while doing the backup.
> The current st.conf entry is (same one that worked on 2.5.1)
> "HP C1557A", "HP DDS-3 4mm DAT loader", "HP_DAT_3",
> "HP C1537A", "HP DDS-3 4mm DAT", "HP_DAT_3";
> HP_DAT_3 = 1,0x34,0,0x9639,4,0x00,0x8c,0x8c,0x8c,1;
> Any ideas?
> Thanks
> Tim Carlson Voice: (505) 984-8800x255
> Director of Computing: Santa Fe Institute Fax: (505) 982-0565
> WWW: Email:

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