Original post
Hi,
When I run scu show edt, parts of the output show
Device: DATA ROUTER Bus: 6, Target: 4, Lun: 0, Type: Array Controller
Device: TZ89 Bus: 6, Target: 4, Lun: 5, Type: Sequential Access
Device: TZ89 Bus: 6, Target: 4, Lun: 6, Type: Sequential Access
When I trry MAKEDEV tzf52, it can not create the device with the following error:
# ./MAKEDEV tzf52
MAKEDEV: special file(s) for tzf52:
MAKEDEV: unknown device in: tzf52
Solution:
Sorry for being late and thanks to all who responded especially Alan who pointed out that MAKEDEV does not create non-zero LUN tape devices and I am attaching his reply for completeness. In the end, I had to do what Alan suggested and created the devices using mknod using the following formula and all now work:
(LUN x 64) + (Target ID x 1024) + (Bus # x 16384) + (Density x 2) + rewind
where
rewind = 0
no_rewind = 1
Density:
low = (0x2)
high = (1x2)
med = (2x2)
aux = (3x2)
Regards,
Hoai Tran
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attached mail follows:
I don't think any version of MAKEDEV supports tapes at
non-zero logical unit numbers. My limited experience
with non-zero tape LUNs is that a reboot will create
them. You can also read the tz and SCSI manual page
to see how to construct the minor device numbers for
tapes and use mknod by hand.
Received on Sun Jul 01 2001 - 23:35:40 NZST