HP Vectra XU 6/XXX HP Vectra XU 6/XXX - Guide to Optimization Performance - Page 22

Disk Striping

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When connecting SCSI devices, it is recommended that you observe the following overall cable length restrictions. Configuration Ultra SCSI operation (20 MB/s) with up to four devices connected Ultra SCSI operation (20 MB/s) with five or more devices connected SCSI-2 operation (10 MB/s) with up to seven devices connected Maximum Recommended Cable Length 3 m 1.5 m 6 m DISK STRIPING If you are using Windows NT, your PC's integrated SCSI controller is able to improve the performance of your SCSI hard disk drives by using disk striping. This is a method of grouping multiple disk drives together so that they seem, to the user, as a single (logical) disk. Data is stored across these multiple disk drives in stripes of equal size; the first stripe is stored on the first drive in the group, the second stripe on the second drive and so forth. The advantage of disk striping is that it significantly reduces the impact of your disk drives' main performance limitation which is the interface between the SCSI channel and the hard disk drive. When your PC writes data to a particular SCSI hard disk drive, that data passes from the integrated SCSI controller to a buffer on the disk drive. The drive then transfers the data from

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When connecting SCSI devices, it is recommended that you observe the following overall
cable length restrictions.
Configuration
Maximum Recommended Cable Length
Ultra SCSI operation (20 MB/s) with
up to four devices connected
3 m
Ultra SCSI operation (20 MB/s) with
five or more devices connected
1.5 m
SCSI-2 operation (10 MB/s) with up to
seven devices connected
6 m
DISK STRIPING
If you are using Windows NT, your PC's integrated SCSI controller is able to improve the
performance of your SCSI hard disk drives by using disk striping. This is a method of grouping
multiple disk drives together so that they seem, to the user, as a single (logical) disk. Data is
stored across these multiple disk drives in stripes of equal size; the first stripe is stored on the
first drive in the group, the second stripe on the second drive and so forth.
The advantage of disk striping is that it significantly reduces the impact of your disk drives’
main performance limitation which is the interface between the SCSI channel and the hard disk
drive.
When your PC writes data to a particular SCSI hard disk drive, that data passes from the
integrated SCSI controller to a buffer on the disk drive. The drive then transfers the data from