I am getting error messages that don't make much sense. They would
lead me to beleive that the tape is bad... I guess. Yet, I have a hard
time beleiving that the two out of four tapes is bad.

issuing an 'mt erase' it get an input/output error.

below are the kernel messages.

could two tapes suddenly just become 'bad'?

Since these are ait tapes and have a 64k ram buffer, I'm wondering if
there may be some bad data there and if there is a way to clear it...

The tape unit is a sony sdx300c.  I've updated it to the latest
firmware. Its attached to an adaptec 2940wide.

Any advice would be greatly appreciated.
============== dmesg ==============================
 
... lots of stuff deleted ...

Disconnected Queue entries: 0:0 
QOUTFIFO entries: 
Sequencer Free SCB List: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 
24 25 26 27 28 29 30 31 
Sequencer SCB Info: 0(c 0x44, s 0xa7, l 0, t 0x0) 1(c 0x0, s 0xff, l 255, t 0xff) 2(c 
0x0, s 0xff, l 255, t 0xff) 3(c 0x0, s 0xff, l 255, t 0xff) 4(c 0x0, s 0xff, l 255, t 
0xff) 5(c 0x0, s 0xff, l 255, t 0xff) 6(c 0x0, s 0xff, l 255, t 0xff) 7(c 0x0, s 0xff, 
l 255, t 0xff) 8(c 0x0, s 0xff, l 255, t 0xff) 9(c 0x0, s 0xff, l 255, t 0xff) 10(c 
0x0, s 0xff, l 255, t 0xff) 11(c 0x0, s 0xff, l 255, t 0xff) 12(c 0x0, s 0xff, l 255, 
t 0xff) 13(c 0x0, s 0xff, l 255, t 0xff) 14(c 0x0, s 0xff, l 255, t 0xff) 15(c 0x0, s 
0xff, l 255, t 0xff) 16(c 0x0, s 0xff, l 255, t 0xff) 17(c 0x0, s 0xff, l 255, t 0xff) 
18(c 0x0, s 0xff, l 255, t 0xff) 19(c 0x0, s 0xff, l 255, t 0xff) 20(c 0x0, s 0xff, l 
255, t 0xff) 21(c 0x0, s 0xff, l 255, t 0xff) 22(c 0x0, s 0xff, l 255, t 0xff) 23(c 
0x0, s 0xff, l 255, t 0xff) 24(c 0x0, s 0xff, l 255, t 0xff) 25(c 0x0, s 0xff, l 255, 
t 0xff) 26(c 0x0, s 0xff, l 255, t 0xff) 27(c 0x0, s 0xff, l 255, t 0xff) 28(c 0x0, s 
0xff, l 255, t 0xff) 29(c 0x0, s 0xff, l 255, 
 t 0xff) 30(c 0x0, s 0xff, l 255, t 0xff) 31(c 0x0, s 0xff, l 255, t 0xff) 
Pending list: 0(c 0x40, s 0xa7, l 0)
Kernel Free SCB list: 15 16 17 18 19 1 2 3 4 5 6 7 8 9 13 12 11 10 
Untagged Q(10): 0 
sg[0] - Addr 0x4366000 : Length 4096
sg[1] - Addr 0x3c27000 : Length 4096
(sa0:ahc1:0:10:0): Queuing a BDR SCB
(sa0:ahc1:0:10:0): Bus Device Reset Message Sent
(sa0:ahc1:0:10:0): no longer in timeout, status = 34b
ahc1: Bus Device Reset on A:10. 1 SCBs aborted
(sa0:ahc1:0:10:0): unable to rewind after test read

============================================================

-- 
David Bear
phone:  480-965-8257
fax:    480-965-9189
College of Public Programs/ASU
Wilson Hall 232
Tempe, AZ 85287-0803
 "Beware the IP portfolio, everyone will be suspect of trespassing"
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