The problem turned out to be the two scsi terminators on the DLT's -- one bad, one loose. Replaced them; the netapp dumps to tape ok, and veritas netbackup is working again.

"Toal, Dave" wrote:

Ernie,

    Hmmm... the terminator was not changed between

the time the dlt was working, and when something broke.

    Both dlt's I tried returned the same error...

maybe the tape library (st9710) is having power or ground problems? All other dlt's in it -- to sun boxes -- are working though.

-----Original Message----- From: Bokkelkamp Ernst SBS ITS ORS AHS 241 To: Toal, Dave Sent: 10/19/01 2:47 AM Subject: RE: "unrecognized error 0xb" -- correct slot for tape scsi?

Are you using a High Voltage Differential (HVD) interface on the DLT7 with a HVD terminator ? If not, that's your problem.

Bye Ernie

-----Original Message----- From: Toal, Dave [mailto:dave.toal@t-t.com] Sent: Freitag, 19. Oktober 2001 04:58 To: toasters@mathworks.com Subject: "unrecognized error 0xb" -- correct slot for tape scsi?

Folks,

    I've been trying to get an F740 filer

to recognize a dlt for several weeks. The error it returns is below. This same error also happens on another filer, also a 740. DLT checks out ok, according to the StorageTek tech's dignostics box.

    Have tried swapping cables, and using

different dlt's -- _always_ this "unrecognized error". The filer has been rebooted many times during this process. mt fsf, bsf, weof, &c all work ok, according to mt status, but all tape writes fail.

-- Dave Toal unix person T&T, nq, MA

statler> dump u0f nrst0a /vol/spool DUMP: Dumping tape file 1 on nrst0a DUMP: creating "/vol/spool/../snapshot_for_backup.0" snapshot. DUMP: Using Full Volume Dump DUMP: Date of this level 0 dump: Fri Oct 19 02:02:52 2001. DUMP: Date of last level 0 dump: the epoch. DUMP: Dumping /vol/spool/ to nrst0a DUMP: mapping (Pass I)[regular files] DUMP: mapping (Pass II)[directories] Fri Oct 19 02:03:10 GMT [isp_main]: Tape (1.0.0):cmdblk 0xfffffc0000e020f8 op 0xa block 64512 aborted command (b 47, 0) DUMP: Tape write failed. Fri Oct 19 02:03:10 GMT [isp_main]: Tape (1.0) unrecognized error 0xbunrecognized error 0xb. DUMP: DUMP IS ABORTED DUMP: Deleting "/vol/spool/../snapshot_for_backup.0" snapshot. statler>