In the continuing effort to provide the price-performance
advantage of the latest disk technology and, at the same, timeprotect
existing customer investment, HP uses the same disk mechanism for
both Single-Ended and Differential disks. However, there is a layer
of transparent hardware that masks the electrical differences. This
enables customers to continue to use both their existing Single-Ended
and their existing Differential interface cards, but it requires
some caution in connecting the disk device to the right interface.
Since an Inquiry by a utility such as ODE MAPPER
returns the same Product ID (for example, ST34573WC) for both the
Single-Ended and the Differential version of the disk, you must
use the HP Model ID to distinguish the Single-Ended (for example,
A3646A) from the Differential (for example, A3647A).
As a work-around for SYSGEN, use the "WC"-suffix
ID (for example, ST34573WC) to bind to the Differential drivers;
use the "N"-suffix ID (for example, ST34573N)
to bind to the Single-Ended drivers.
 |
| |
|
 | CAUTION: It is critical that you connect the disk drive to
the right bus: Single-Ended to Single-Ended; Differential to Differential.
Failure to do so will result in unexpected system behavior. |
|
| |
|
Table 8-2 HP Model Disk
Drives
| HP Model |
|---|
| Single-Ended | Differential |
| A3517A | A3318A |
| A3646A | A3647A |
The following table details the Product IDs and the SCSI interface
IDs.
Table 8-3 Product
ID for Configuring Disk Drives
| Drive Cap. | Drive Type | Product ID | Product ID for Corresponding
Device Adapter |
|---|
Raw Mech | Hot-Swap Module | SYSGEN |
|---|
2 GB | SE | ST32272N | ST32272WC | ST32272N | HP27251A(CIO) HP28642A-SCSI(NIO) A1703-60003-SCSI(NIO)
A2372-60003-SCSI(NIO) A2372-60004-SCSI(NIO) |
2 GB | DF | ST32272WC | ST32272WC | ST32272WC | HP28696A(NIO) A2372-60003-FWSCSI(NIO)
A2372-60004-FWSCSI(NIO) |
4 GB | SE | ST34572N ST34573N | ST34572WC ST34573WC | ST34572N ST34573N | HP27251A(CIO) HP28642A-SCSI(NIO) A1703-60003-SCSI(NIO)
A2372-60003-SCSI(NIO) A2372-60004-SCSI(NIO) |
4 GB | DF | ST34572WC ST34573WC NA | ST34572WC ST34573WC DGHS04Y | ST34572WC ST34573WC DGHS04Y | HP28696A(NIO) A2372-60003-FWSCSI(NIO)
A2372-60004-FWSCSI(NIO) |
9 GB | SE | ST39173N | ST39173N | ST39173N | HP28642A-SCSI(NIO) A1703-60003-SCSI(NIO) A2372-60003-SCSI(NIO)
A2372-60004-SCSI(NIO) |
9 GB | DF | ST39173WC NA | ST39173WC DGHS09Y | ST39173WC DGHS09Y | HP28696A(NIO) A2372-60003-FWSCSI(NIO)
A2372-60004-FWSCSI(NIO) |
18 GB | DF | ST118273WC | ST118273WC | ST118273WC | HP28696A(NIO) A2372-60003-FWSCSI(NIO)
A2372-60004-FWSCSI(NIO) |
