Closing /dev/st0 return EIO error, /dev/nst0 not
From: Gilles Hamel (hamel_g_at_club-internet.fr)
Date: 11/08/03
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Date: Sat, 08 Nov 2003 16:34:49 +0100
Hello,
I have a old tape streamer Exabyte EXB-8200.
Backup and restore work fine. However, when I use the device file
/dev/st0 (rewind on close),i get the error EIO on close() and the
streamer doesn't rewind the tape :
$ dd if=/dev/zero of=/dev/nst0 bs=4096 count=1
works fine, no error
$ strace dd if=/dev/zero of=/dev/st0 bs=4096 count=1
dd write the block, and failed when it close /dev/st0 :
...
close(0) = 0
open("/dev/zero", O_RDONLY|O_LARGEFILE) = 0
close(1) = 0
open("/dev/st0", O_WRONLY|O_CREAT|O_TRUNC|O_LARGEFILE, 0666) = 1
rt_sigaction(SIGINT, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGINT, {0x80493b0, [], SA_RESTORER, 0x40048988}, NULL, 8) = 0
rt_sigaction(SIGQUIT, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGQUIT, {0x80493b0, [], SA_RESTORER, 0x40048988}, NULL, 8) = 0
rt_sigaction(SIGPIPE, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGPIPE, {0x80493b0, [], SA_RESTORER, 0x40048988}, NULL, 8) = 0
rt_sigaction(SIGUSR1, NULL, {SIG_DFL}, 8) = 0
rt_sigaction(SIGUSR1, {0x8049410, [], SA_RESTORER, 0x40048988}, NULL, 8) = 0
brk(0) = 0x8051000
brk(0x8053000) = 0x8053000
read(0, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
4096) = 4096
write(1, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"...,
4096) = 4096
write(2, "1+0 records in\n", 151+0 records in
) = 15
write(2, "1+0 records out\n", 161+0 records out
) = 16
close(0) = 0
close(1) = -1 EIO (Input/output error)
write(2, "dd: ", 4dd: ) = 4
write(2, "closing output file `/dev/st0\'", 30closing output file
`/dev/st0') = 30
write(2, ": Input/output error", 20: Input/output error) = 20
There is no errors from kernel.
To rewind the tape I must use "mt -f /dev/nst0 rewind".
"mt -f /dev/st0 status" also works fine, the streamer rewinds the tape.
$ uname -a
Linux darkstar 2.4.22 #4 Thu Oct 30 22:11:45 CET 2003 i686 unknown
unknown GNU/Linux
$ cat /proc/scsi
cat: /proc/scsi: Is a directory
$ cat /proc/scsi/scsi
Attached devices:
Host: scsi0 Channel: 00 Id: 04 Lun: 00
Vendor: EXABYTE Model: EXB-8200 Rev: 2618
Type: Sequential-Access ANSI SCSI revision: 01
$ cat /proc/scsi/tmscsim/0
Tekram DC390/AM53C974 PCI SCSI Host Adapter, Driver Version 2.0f 2000-12-20
SCSI Host Nr 0, DC390 Adapter Nr 0
IOPortBase 0xe000, IRQ 10
MaxID 7, MaxLUN 1, AdapterID 7, SelTimeout 250 ms, DelayReset 1 s
TagMaxNum 32, Status 0x00, ACBFlag 0x00, GlitchEater 24 ns
Statistics: Cmnds 4695, Cmnds not sent directly 0, Out of SRB conds 0
Lost arbitrations 0, Sel. connected 0, Connected: No
Nr of attached devices: 1, Nr of DCBs: 1
Map of attached LUNs: 00 00 00 00 01 00 00 00
Idx ID LUN Prty Sync DsCn SndS TagQ NegoPeriod SyncSpeed SyncOffs MaxCmd
00 04 00 Yes No Yes No No (100 ns) 01
Commands in Queues: Query: 0:
Any ideas ?
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