Incorrect disk identification

[Gary Cowell]

I'm trying to identify the disks that are plugged into a HP A3311A cabinet on a 9000/K260.

IO SCAN tells me this:
10/4/12 ext_bus HP 28696A - Wide SCSI ID=7
10/4/12.0 target
10/4/12.0.0 disk SEAGATE ST34371N
10/4/12.1 target
10/4/12.1.0 disk SEAGATE ST34572WC
10/4/12.2 target
10/4/12.2.0 disk SEAGATE ST34572WC
10/4/12.3 target
10/4/12.3.0 disk SEAGATE ST34371W
10/4/12.4 target
10/4/12.4.0 disk SEAGATE ST34573WC
10/4/12.5 target
10/4/12.5.0 disk SEAGATE ST34572WC

However, this can't be right as all of those model numbers are for single ended drives and this is a differential controller.

Is it possible that the disks are reporting the incorrect product code?

I think that (for example) the ST34572WC drive reported by IOSCAN should be a ST34572DC According to seagate, the *WC is a SCA 80 pin single ended disk, and the *DC variant is SCA 80 pin differential.

Is this a common problem, or have I somehow got single ended disks in this cabinet?

[Carlos Fernandez Riera]

I think it is correct what ioscan say.

See: http://forums.itrc.hp.com/cm/QuestionAnswer/1,,0x7beff9beca68d511abcd0090277a778c,00.html

[Gary Cowell]

I read the article and I'm possibly even more confused.

I know its possible for the Jamaica to be connected to either a SE or DF controller, but in this case it's definatley on the HP-PB Fast/Wide differential.

The disk carriers in the Jamaica are labelled with DF stickers (purple as I recall).

The part numbers reported by IOSCAN are definatley singled ended.

Yours,

Confused.

[Carlos Fernandez Riera]

F/W, sure.


run diskinfo -v :

/# diskinfo -v /dev/rdsk/c1t12d0
SCSI describe of /dev/rdsk/c1t12d0:
vendor: SEAGATE
product i...

[Gary Cowell]

Yes. I get the same response from my disk as you posted.

So if I understand this correctly, HP took a Single Ended ST34572WC and modified it to work off a differential controller.

Thus creating the HP03 revision.

[Patrick Wessel · Accepted solution]

Gary,
In the housing of the disk is a converter that adapts the fast single ended disk ST34371N to the HVD bus.
It is essential that a SCSI converter is transparent to the system, due to that is it not visible in the ioscan

[Sanjay_6]

Hi Gary,

There is probably a scsi converter being used between the cable and the disk. This converter can change a high density fast disk to a low density narrow disk to be used with a narrow scsi channnel.

Hope this helps.

regds

[Gary Cowell]

Everything is clear now. Thank you all for your help.

I'd never have figgured out the 'differential convertor in the drive cradle' on my own!