SCSI Solutions White Paper - HP-UX

2 HP Solutions

HP supports a range of pSCSI solutions for HP-UX servers, including disk storage enclosures,

tape products, optical jukebox devices, and Host Bus Adapters (HBAs). Each of these is

discussed below.

2.1 Disk Products

The pSCSI disk products consist of disk drives and enclosures. The enclosures house multiple

disk drives, and provide power supplies, fans, hot-swappable drive slots, and other

management and availability features. There are two main classes of pSCSI disk enclosures

currently available on HP-UX: the Disk System (DS) 21XX Series, and the Modular Smart Array

(MSA) 30 Series. The DS21XX products are smaller, lower-cost enclosures, while the MSA30

products are larger, more intelligent enclosures. An overview of each is provided below.

2.1.1 DS2120 Enclosure

The newest DS Series enclosure, the DS2120, is an Ultra160 SCSI 4-disk enclosure. It is

intended for customers that need low-cost external non-HA storage without enclosure

management or redundant or hot-swappable enclosure components (fans, power supplies, I/O

modules). The disk drives are hot-swappable, and supported drives range from 36 to 300

Giga Bytes (GB). It is designed to replace the recently discontinued DS2100 and DS2110

enclosures. The DS2120 comes in a compact 1U package, as seen below from a top-front-left

view, with the 4 disk drive module units accessible from the front.

The DS2120 is supported on HP-UX 11.00, 11i v1, and 11i v2 across a range of platforms and

HBAs, and is supported as a boot or dump device in most of those configurations. For OS

versions, platforms, and HBAs supported with the DS2120, go to

www.hp.com/go/serverconnectivity and click on StorageWorks support matrices.

Note: The DS2120 is not supported with the SCSI RAID Controller cards (see section 2.4.2).

The DS2120 is an Ultra160 enclosure, but is supported with Ultra320 HBAs and drives. When

used with Ultra320 HBAs, the bus must be speed-limited to Ultra160 speeds

. As of AR0505 of

To limit the speed see the sections on “Setting the SCSI Parameters” and “About the Maximum Data Transfer Rate” in the A7173A HBA

Support Guide available at http://docs.hp.com/en/J6373-90008/J6373-90008.pdf.

DS2120