HP ML570 - ProLiant - G2 Tuning Manual page 6

Novell NetWare 6 performance tuning guidelines for ProLiant servers
There have been significant improvements in drive technology over the past decade. For
instance, disk drive media speeds continue to increase. HP offers a wide range of drive
spindle speeds in revolutions per minute (rpm). For instance, there are 10,000 and
15,000 rpm disk drives. The 15,000 rpm models are available in 18.2 GB and 36.4 GB
with an average seek time of 3.8 ms, while the 10,000 rpm models are available in
18.2 GB, 36.4 GB, and 72.8 GB with an average seek time of 5.5 ms. It is therefore,
advisable to choose the appropriate disk type with the highest speed your SCSI interface
and controller can support.
Similarly, as shown in table 2, HP has both Smart Array and Non Array controllers; all
with different performance and capacity. The non-arrays such as the Integrated Drive
Electronics (IDE) controllers and the low-end array controllers are typically embedded on
the system board.
table 2. Smart Array and Non Array controllers
Smart Array channels
controllers
Smart Array 2
5312
Smart Array 4
5304
Smart Array 2
5302
Smart Array 3
4250ES
Smart Array 2
532
Smart Array 1
431
Smart Array 2
5i plus
Smart Array 2
5i
Integrated 1
Smart Array
*- used for code, transfer buffers, and non-battery backed cache
**- based on use of HP storageWorks 14 HDD enclosure
***- depends on server
cache max drive
(read/write) supported
128 28
256 128 56
128 64 28 56**
32*
64 21
32* 20
16 14**
64* 20
32* 20
16* ***
SCSI protocol compatibility
supported table
Ultra3
Ultra2
Ultra3 support for
Ultra2 ADG
Wide Ultra
Ultra3 optional
Ultra2 support for
Wide Ultra ADG
Ultra2
Wide Ultra
Ultra3
Ultra2
Ultra3
Ultra2
Wide Ultra
Ultra3
Ultra2
Ultra3
Ultra2
Ultra2
Wide Ultra
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