Operating System - Tru64 Unix
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Re: tape drive on tru64 5.1

 
Ralf Puchner
Honored Contributor

Re: tape drive on tru64 5.1

be sure you configured the hardware properly not mixing changer and tapes on same bus.
Help() { FirstReadManual(urgently); Go_to_it;; }
Julie Harold_1
Advisor

Re: tape drive on tru64 5.1

the changer is an external unit - it has the tape drive within it. Each changer/tape unit is on it's own scsi chain.

My understanding from the console and scu show edt is that the changer is lun1 and the tape drive is lun 0

>scu show edt
0 6 0 Sequential SCSI-3 ARCHIVE Python 06241-XXX 8160 W
0 6 1 Changer SCSI-3 ARCHIVE Python 06241-XXX 8160 W
8 6 0 Sequential SCSI-3 SEAGATE DAT 06241-XXX 8110 N
8 6 1 Changer SCSI-3 SEAGATE DAT 06241-XXX 8110 N

how come scu can see it but hwmgr can't ?
Julie Harold_1
Advisor

Re: tape drive on tru64 5.1

I have just found this on another thread

# hwmgr view d
HWID: Device Name Mfg Model Location
------------------------------------------------------------------------------



226: /dev/ntape/tape4 COMPAQ SDLT320 bus-1-targ-0-lun-2
227: /dev/changer/mc2 MSL5000 Series bus-1-targ-0-lun-0
228: /dev/ntape/tape5 COMPAQ SDLT320 bus-1-targ-0-lun-1

so they are managing to see the other luns - what am I missing ?
Uwe Zessin
Honored Contributor

Re: tape drive on tru64 5.1

Julie,
what is the output of
# hwmgr -show scsi -did 9 -full

please try to post it as a .TXT attachment. If you simply paste it in the message box all spaces are collapsed.

--

I beleive there is a problem with the reporting of these devices. They look the same to Tru64 Unix Version 5, so it beleives LUNs 0 and 1 are just different paths to the same device.

.
Julie Harold_1
Advisor

Re: tape drive on tru64 5.1

that gives me nothing at all

is this - more use (bus 8)
Uwe Zessin
Honored Contributor

Re: tape drive on tru64 5.1

Interesting...

Anyway, the last output clearly shows that the operating system beleives that bus:target:lun 8:6:0 and 8:6:1 refer to the same device. It somehow cannot tell them apart.
.
Julie Harold_1
Advisor

Re: tape drive on tru64 5.1

I have just done a sys_check and it clearly shows that scu can tell them apart but the hwmgr can't. Where do I go from here ?
Julie Harold_2
New Member

Re: tape drive on tru64 5.1

I really only need the drive for tar and dump - so I can do without the changer bit. Is there some way I can either use the changer to do tar and dump, or alternatively tell the system to ignore the changer and map the drive only ?
Ralf Puchner
Honored Contributor

Re: tape drive on tru64 5.1

Please check if cabling is ok, which means there are some limitations regarding changer/tape mix on same bus.

Verify the named tape/changer is supported with the OS-version and ddr database contains valid entries for the tape/changer.
(see http://ftp.support.veritas.com/pub/support/products/NetBackup_DataCenter/255216.pdf - Tru64 5.x config - for information which entries are necessary)

Next be sure you installed the latest patchkit, e.g. a problem in 5.1A pk 3 leads to similar problem.

If using only the tape drives, unplug the changer and delete the device within Tru64 (hwmgr/dsfmgr - have a look into the admin guide explaining syntax and command)
Help() { FirstReadManual(urgently); Go_to_it;; }
Yong_7
Frequent Advisor

Re: tape drive on tru64 5.1

Julie,

here is my plan for your reference.
the idea is put the pieces on one by one.


1. if applicable, apply the latest patch kit
2. "hwmgr -delete" to remove the changer AND tape.
3. disconnect changer and keep tape connected.
4. /sbin/dn-setup -install_tape
5. is tape working fine ? ( i bet it's working )
6. ( hwmgr -delete ) remove tape and disconnect
7. connect changer.
8. do same to create device name
9. does changer work ?
(assuming you connect HW to where they used to be )if it works, confilict between changer and tape due to bus # ? low quality cable ? whatever ?

if it won't work. compatibilities ?

just thoughts.

Good Luck!