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Chaining two SAS Tapes
Hi,
I have two PowerVault LTO-4-120HH Tapes Drives (IBM) witch are installed in a Dell PowerVault 114x enclosure. My idea was to chain them with the following schema:
Server --> Tape 1 Sas port 1
Tape 1 Sas port 2 --> Tape 2 Sas port 1
The problem is that my centos server doesn't detect the second Tape. Nothing appears on DMESG or when doing a lsscsi.
Is there something I should do in order to chain both tapes? I tried to find a manual to do that but I couldn't find anything.
I also red that some people doesn't recommend to chain tapes... Any one knows the reason why?
Thanks,
Daniel.
tommo666
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November 1st, 2011 06:00
SAS Cabled devices do not support daisy chaining, , you would need a Y cable, something like this: www.elpeus.com/external-mini-sas-cables-sff8088-to-2-sff8088-c-6_43_116.html
DLopezP
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November 2nd, 2011 06:00
Thanks for the answer. :)
tommo666
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November 3rd, 2011 16:00
No probs, i've not seen Dell ship these cables but i know Quantum will ship them with their tape libraries.