http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1356
Summary: virtualized fibrechannell tape and media changer works
only partially
Product: Xen
Version: unstable
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: Hypervisor
AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
ReportedBy: nice@xxxxxxxxxxxxxxx
Hyptervisor: 64 bit
dom0: 32 bit (PAE) openSUSE 10.3 with Xen-3.3.0 and linux-2.6.18 from xen.org
dom0: 32 bit (PAE) openSUSE 10.3 with linux-2.6.18 from xen.org
The tape and changer (the latter handled by the "st" driver and "mover" utiliy)
seem to work in the dom0, but onyl partially(!) in domU:
#############################################################
#############################################################
##################### domU config:
name="u-96"
uuid="7b77d277-e99a-e25b-3652-61e936f78aaa"
memory=512
vcpus=1
on_poweroff="destroy"
on_reboot="restart"
on_crash="destroy"
on_xend_start = "ignore"
on_xend_stop = "shutdown"
localtime=0
keymap="en-us"
builder="linux"
kernel="/boot/vmlinux-2.6.18.8-xen_330"
ramdisk="/boot/initrd-2.6.18.8-xen_330-domU"
root="/dev/xvda2"
extra="console=tty1"
disk=[ 'phy:/dev/mapper/u-96,xvda,w','phy:/dev/mapper/u-96-home,xvdb,w' ]
vif=[ 'mac=00:16:3e:0b:e9:49,bridge=eth0','mac=00:16:3e:0b:ea:49,bridge=vlan1'
]
vscsi=[ '1:0:2:0, 0:0:0:0','1:0:2:1, 0:0:0:1','3:0:2:0, 0:0:1:0' ]
vfb=['type=vnc,vncdisplay=10']
#############################################################
#############################################################
##################### dom0 SCSI behaviour:
u-96:~ # modprobe st
u-96:~ # dmesg
st: Version 20050830, fixed bufsize 32768, s/g segs 256
st 1:0:2:0: Attached scsi tape st0
st0: try direct i/o: yes (alignment 512 B)
st 3:0:2:0: Attached scsi tape st1
st1: try direct i/o: yes (alignment 512 B)
st0: Block limits 1 - 16777215 bytes.
u-96:~ # modprobe ch debug=1
u-96:~ # dmesg
SCSI Media Changer driver v0.25
ch0: command: <6>Mode Sense(6) 1a 20 1d 00 ff 00
ch0: result: 0x0
ch0: type #1 (mt): 0x0+1 [medium transport]
ch0: type #2 (st): 0x3e9+48 [storage]
ch0: type #3 (ie): 0x0+0 [import/export]
ch0: type #4 (dt): 0x1+2 [data transfer]
ch0: command: <6>Read element status b8 24 00 01 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: dt 0x1: ID/LUN unknown
ch0: command: <6>Read element status b8 24 00 02 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: dt 0x2: ID/LUN unknown
ch0: INITIALIZE ELEMENT STATUS, may take some time ...
ch0: command: <6>Reasssign Blocks 07 20 00 00 00 00
ch0: result: 0x0
ch0: ... finished
ch 1:0:2:1: Attached scsi changer ch0
carrier3:~ # mover
/dev/sch0: mt=1 st=48 ie=0 dt=2
medium transport
0:
storage
0: access
1: access
2: access full tag: '000003L4 '
3: access full tag: '000004L4 '
4: access full tag: '000005L4 '
5: access full tag: '000021L4 '
6: access full tag: '000007L4 '
7: access full tag: '000008L4 '
8: access
9: access full tag: '000026L4 '
10: access full tag: '000011L4 '
11: access full tag: '000012L4 '
12: access full tag: '000013L4 '
13: access full tag: '000014L4 '
14: access full tag: '000015L4 '
15: access full tag: '000016L4 '
16: access full tag: '000017L4 '
17: access full tag: '000018L4 '
18: access full tag: '000019L4 '
19: access full tag: '000006L4 '
20: access
21: access full tag: '000022L4 '
22: access full tag: '000023L4 '
23: access full tag: '000024L4 '
24: access full tag: '000010L4 '
25: access
26: access full tag: '000027L4 '
27: access full tag: '000028L4 '
28: access full tag: '000029L4 '
29: access full tag: '000030L4 '
30: access full tag: '000031L4 '
31: access full tag: '000032L4 '
32: access full tag: '000033L4 '
33: access full tag: '000034L4 '
34: access full tag: '000035L4 '
35: access full tag: '000036L4 '
36: access full tag: '000037L4 '
37: access full tag: '000038L4 '
38: access full tag: '000039L4 '
39: access
40: access
41: access
42: access
43: access full tag: '000040L4 '
44: access full tag: '000025L4 '
45: access full tag: '000020L4 '
46: access full tag: '000009L4 '
47: access full tag: '000002L4 '
import/export
data transfer
0: access full tag: '000001L4 '
1: access
carrier3:~ # dmesg
ch0: command: <6>Read element status b8 31 00 00 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 31 00 00 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 31 00 00 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 e9 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 e9 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ea 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ea 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 eb 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 eb 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ec 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ec 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ed 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ed 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ee 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ee 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ef 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ef 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f0 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f0 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f1 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f1 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f2 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f2 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f3 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f3 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f4 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f4 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f5 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f5 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f6 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f6 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f7 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f7 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f8 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f8 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f9 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f9 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fa 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fa 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fb 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fb 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fc 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fc 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fd 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fd 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fe 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fe 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ff 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ff 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 00 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 00 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 01 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 01 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 02 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 02 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 03 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 03 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 04 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 04 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 05 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 05 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 06 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 06 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 07 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 07 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 08 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 08 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 09 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 09 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0a 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0a 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0b 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0b 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0c 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0c 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0d 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0d 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0e 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0e 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0f 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0f 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 10 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 10 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 11 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 11 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 12 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 12 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 13 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 13 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 14 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 14 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 15 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 15 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 16 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 16 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 17 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 17 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 18 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 18 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 e9 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ea 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 eb 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ec 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ed 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ee 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ef 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f0 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f1 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f2 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f3 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f4 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f5 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f6 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f7 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f8 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 f9 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fa 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fb 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fc 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fd 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 fe 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 03 ff 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 00 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 01 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 02 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 03 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 04 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 05 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 06 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 07 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 08 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 09 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0a 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0b 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0c 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0d 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0e 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 0f 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 10 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 11 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 12 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 13 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 14 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 15 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 16 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 17 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 32 04 18 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 34 00 01 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 34 00 01 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 34 00 02 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 34 00 02 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 34 00 01 00 01 00 00 00 ff 00 00
ch0: result: 0x0
ch0: command: <6>Read element status b8 34 00 02 00 01 00 00 00 ff 00 00
ch0: result: 0x0
carrier3:~ # mt --file=/dev/nst0 status
drive type = Generic SCSI-2 tape
drive status = 1174405120
sense key error = 0
residue count = 0
file number = -1
block number = -1
Tape block size 0 bytes. Density code 0x46 (unknown).
Soft error count since last status=0
General status bits on (1010000):
ONLINE IM_REP_EN
carrier3:~ # mt --file=/dev/nst0 rewind
carrier3:~ # dd of=/dev/nst0 bs=262144 count=100 conv=sync if=/dev/zero
100+0 records in
100+0 records out
26214400 bytes (26 MB) copied, 2.73592 s, 9.6 MB/s
#############################################################
#############################################################
##################### domU SCSI behaviour:
u-96:~ # modprobe st
u-96:~ # dmesg
st: Version 20050830, fixed bufsize 32768, s/g segs 256
st 0:0:1:0: Attached scsi tape st0
st0: try direct i/o: yes (alignment 512 B)
st 0:0:0:0: Attached scsi tape st1
st1: try direct i/o: yes (alignment 512 B)
st1: Block limits 1 - 16777215 bytes.
u-96:~ # modprobe ch debug=1
u-96:~ # dmesg
SCSI Media Changer driver v0.25
ch0: command: <6>Mode Sense(6) 1a 20 1d 00 ff 00
ch0: result: 0x0
ch0: type #1 (mt): 0x0+1 [medium transport]
ch0: type #2 (st): 0x3e9+48 [storage]
ch0: type #3 (ie): 0x0+0 [import/export]
ch0: type #4 (dt): 0x1+2 [data transfer]
ch0: command: <6>Read element status b8 24 00 01 00 01 00 00 00 ff 00 00
ch0: result: 0x8000002
ch0: Current: sense key: Illegal Request
Additional sense: Invalid command operation code
ch0: READ ELEMENT STATUS for element 0x1 failed
ch0: dt 0x1: READ ELEMENT STATUS failed
ch0: command: <6>Read element status b8 24 00 02 00 01 00 00 00 ff 00 00
ch0: result: 0x8000002
ch0: Current: sense key: Illegal Request
Additional sense: Invalid command operation code
ch0: READ ELEMENT STATUS for element 0x2 failed
ch0: dt 0x2: READ ELEMENT STATUS failed
ch0: INITIALIZE ELEMENT STATUS, may take some time ...
ch0: command: <6>Reasssign Blocks 07 20 00 00 00 00
ch0: result: 0x8000002
ch0: Current: sense key: Illegal Request
Additional sense: Invalid command operation code
ch0: ... finished
ch 0:0:0:1: Attached scsi changer ch0
u-96:~ # mover
/dev/sch0: mt=1 st=48 ie=0 dt=2
medium transport
ioctl failed (GSTATUS): Input/output error
u-96:~ # dmesg
ch0: command: <6>Read element status b8 31 00 00 00 01 00 00 00 ff 00 00
ch0: result: 0x8000002
ch0: Current: sense key: Illegal Request
Additional sense: Invalid command operation code
ch0: device has no volume tag support
ch0: command: <6>Read element status b8 21 00 00 00 01 00 00 00 ff 00 00
ch0: result: 0x8000002
ch0: Current: sense key: Illegal Request
Additional sense: Invalid command operation code
ch0: READ ELEMENT STATUS for element 0x0 failed
u-96:~ # mt --file=/dev/nst1 status
drive type = Generic SCSI-2 tape
drive status = 1174405120
sense key error = 0
residue count = 0
file number = 0
block number = 0
Tape block size 0 bytes. Density code 0x46 (unknown).
Soft error count since last status=0
General status bits on (41010000):
BOT ONLINE IM_REP_EN
u-96:~ # mt --file=/dev/nst1 rewind
u-96:~ # dd of=/dev/nst1 bs=262144 count=100 conv=sync if=/dev/zero
dd: writing `/dev/nst1': Device or resource busy
1+0 records in
0+0 records out
0 bytes (0 B) copied, 2.62983 s, 0.0 kB/s
u-96:~ # dd of=/dev/nst1 bs=512 count=100 conv=sync if=/dev/zero
100+0 records in
100+0 records out
51200 bytes (51 kB) copied, 1.56228 s, 32.8 kB/s
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