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two tape drive on same scsi ID 3 (possible)

Akif_1
Super Advisor

two tape drive on same scsi ID 3 (possible)

Hi All,

OS:HP-UX 11.11
Server:rp7410
DB:Oracle 10g RAC

hp surestore tape array 5300(pic attached)

The above tape array use by one of the tape drive and i wanted to installed a new tape drive by keeping the existing one as well.

* Does this multiple tape drive installation possible on hp-ux server.
*Does it require driver installation as "stape" already IN IN under kernal drivers.
*Does it change kernel parameters.
*As i noticed the tape array :Bay1 SCSI ID 3 is used by the existing tape drive (sure store DLT 80).
*Available is "Bay3 SCSI ID 3(same as above)" Can i use this with a cable C2978B REV:E..... 5183-2670 ..... FDCH 0803 with terminator.
*What precautions need to be follows.

Have a lovely to all genius :)

Regard's
T(ogether) E(very one) A(chive) M(ore)
15 REPLIES
nijokj
Trusted Contributor

Re: two tape drive on same scsi ID 3 (possible)

better you change the scsi id of bay three two someting else other than 3.

Hp-ux will support multiple tape drives.
No driver installation is required.
no need to change any kernel parameter.

after connecting tape drive do


insf -C tape
ioscan -fnC tape
Akif_1
Super Advisor

Re: two tape drive on same scsi ID 3 (possible)

Hello,

How can i change SCSI ID on tape array (ex 5)

and after SCSI changed can i use another tape drive through below cable (shorter one)on tape array available Bay3.

cable C2978B REV:E
5183-2670
FDCH 0803
Made in china

Does terminator necessary or i can leave open.

Regd's
T(ogether) E(very one) A(chive) M(ore)
nijokj
Trusted Contributor

Re: two tape drive on same scsi ID 3 (possible)

Yes defnitely you can change scsi id in bay3.see the picture there I marked with red colour in which there is a small switch you should press it then no: will change.
After that you can connect the cable with terminator.
nijokj
Trusted Contributor

Re: two tape drive on same scsi ID 3 (possible)

Forget to upload the attachment. Please see that.
Akif_1
Super Advisor

Re: two tape drive on same scsi ID 3 (possible)

Hi,

I appreciate ur valuable input........

After changing SCSI ID , as existing Bay1 SCSI ID 3 belongs to node_abc1.

If i choose Bay3 SCSI ID 5 , *How can i present this SCSI 5 to node_abc1.

Regard's
Mohammed
T(ogether) E(very one) A(chive) M(ore)
nijokj
Trusted Contributor

Re: two tape drive on same scsi ID 3 (possible)

daisy chaning is possible in hp tape array 5300 .Please refer the following pdf 33-34 pages for your connections assistance.

http://bizsupport1.austin.hp.com/bc/docs/support/SupportManual/c00398066/c00398066.pdf
nijokj
Trusted Contributor

Re: two tape drive on same scsi ID 3 (possible)

refer 31-32 pages
Bill Hassell
Honored Contributor

Re: two tape drive on same scsi ID 3 (possible)

You have a DLT80 already but you did not mention the model of tape drive. Tape drives don't play well with each other on a single bus. As long as you only use on drive at a time, you may be OK but it depends on the other drive model. Ultrium drives, especially LTO2 and higher, will have reliability and throughput problems.


Bill Hassell, sysadmin
Akif_1
Super Advisor

Re: two tape drive on same scsi ID 3 (possible)

Hi,

The tape & tape drive details are:

DLT IV sure store DLT80 (Tape drive)
existing cartridge model is C5141F (40-80GB).

But i have a data of 110GB , does above compressed upto 80GB or for server model like rp7410 support latest tape drives.

Kindly recommend multiple drive use is better or replace new drive with more capacity and compatible to existing drive of above model on my server rp7410.

Regard's
T(ogether) E(very one) A(chive) M(ore)
Torsten.
Acclaimed Contributor

Re: two tape drive on same scsi ID 3 (possible)

Depending on the drive model you canor cannot daisy chain the drives (due to bandwidth).

However, there are switches at the rear side of the TA5300 chassis to configure the SCSI ids (press + or -).

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
Akif_1
Super Advisor

Re: two tape drive on same scsi ID 3 (possible)

Thanks Torsten,


If iam connecting new tape drive to the existing one no problem.

But if i use two tape drives including the existing Bay1 SCSI ID3 one and if i changed SCSI ID 5 on Bay3.

How can i represent this new SCSI ID 5 on a particular node like abc_node1.

Regard;s
T(ogether) E(very one) A(chive) M(ore)
Torsten.
Acclaimed Contributor

Re: two tape drive on same scsi ID 3 (possible)

Well, you need a cable between the two drives:

server - tape1 - tape2 - terminator

Hope this helps!
Regards
Torsten.

__________________________________________________
There are only 10 types of people in the world -
those who understand binary, and those who don't.

__________________________________________________
No support by private messages. Please ask the forum!

If you feel this was helpful please click the KUDOS! thumb below!   
nijokj
Trusted Contributor

Re: two tape drive on same scsi ID 3 (possible)

if you check the 31-32 pages you can find a figure there it is how you can connect the two tape drives with a cable and terminator as Torsten said.
Bill Hassell
Honored Contributor

Re: two tape drive on same scsi ID 3 (possible)

> But i have a data of 110GB , does above compressed upto 80GB or for server model like rp7410 support latest tape drives.

C5141F = DLT-4 = 40 GB storage
DLT80 = DLT-4 = 40 GB storage

So you have two DLT4 drives? This will be OK, especially if you use one tape, and then use the other so the total capacity is 80 GB. A word about compression: 2:1 compression means that if the data is highly compressible, then the tapes will appear to hold as much as 80 GBs. But this is optimistic unless most of your data is plain text (most HP-UX systems are not).

You rp7410 will support a more modern tape drive such as Ultrium (LTO1,2,etc) where the LTO1 can easily hold your 110 GB of data on one tape. Note that the DLT tapes cannot be used on the LTO drives.

Here is a good reference for tape drives from HP:

http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?lang=en&cc=us&objectID=c00028345


Bill Hassell, sysadmin
Akif_1
Super Advisor

Re: two tape drive on same scsi ID 3 (possible)

Thanks all for their valuable feedback on time .............

Have a lovely life 2 all.

Regard's
T(ogether) E(very one) A(chive) M(ore)