replacing HP SCSI drives with OEM scsi drives

[james below_1]

On my 9000/k360, I currently have 4 9gb 7200rpm drives hp part # A3629a. According to ioscan, these are SEAGATE ST39173WC drives.

I have 2 seagate st336706LC (36gb 10,000 rpm) drives that I would like to replace 2 of the 9gb drives with. Will the 9000 recognize these generic seagate drives? Does HP add information to the drives/ make them propriatary? Is there anything that would prevent these generic drives from working?
Does HP modify the drive bios?
Can the controller handle 10,000 rpm drives?

thanks

[A. Clay Stephenson]

Hi James:

This particular drive (LC) will not work; it is LVD SCSI anf the K-box must run HVD SCSI. In general, you can replace the drives with
OEM models without problem. In a few cases and especiallly under older firmware and OS's, boot drives are more picky. Data drives work just fine. You should be able to find HVD scsi drives which will work just fine.

[james below_1]

So if these are HVD drives, why does "ioscan" report the model numbers of the internal drives to be the lvd equivalent? I'm confused....

#ioscan |grep -i seagate
10/0.3.0 disk SEAGATE ST39173WC
10/0.4.0 disk SEAGATE ST39173WC
10/0.5.0 disk SEAGATE ST39173WC
10/0.6.0 disk SEAGATE ST39173WC
#

Did HP ever use a lvd <-> hvd converter/daughter board in the k360s?

[A. Clay Stephenson]

Actually,
ioscan reporting the drives as WC is quite common and WC's are definitely single-ended. However, the A3629A is definitely a FWD drive. The K-box (with the exception of the internal SE bus for the DDS and CD-ROM drives) are FWD. The hot-plug drives (which are usually WC's) have a small daughter card between the connection of the back of the drive module and the physical drive within the enclosure and it does the FWD to SE conversion. It appears that the A3629A must have the same sort of arrangement. People have had varying degrees of success trying to replace the drives within the modules and using the existing daughter board. Some of the failures have been rather severe taking out the drive, the daughter board, and the controller. If I were you, I would locate some known FWD drives.