Adaptec GDTSETUP Manual de usuario descargar pdf (Pagina 164)

164

(Note: All Host Drives on the screen shown above are idle.)

*/RJLFDO'ULYHV

This menu option yields a list of available Logical Drives (level 2). Logical Drives are the

components for Array Drives and Host Drives. In its most simple form, a Host Drive con-

sists of one Logical Drive which is made up of a single hard disk (type disk). In case of RAID

Host Drives, the performance of the Logical Drives forming a RAID Host Drive are shown in

the menu Logical Drives. The performance data displayed here gives immediate information

on the quality of a given Host Drive. When judging the indicated performance of Logical

Drives belonging to a RAID Host Drive, the following considerations should be taken into

account:

(a) RAID 0, RAID 1, RAID 10 and RAID 5 Host Drives

If a certain Logical Drive shows poor performance for a longer period (when compared to

the other Logical Drives), this Logical Drive impairs the overall performance, making it the

bottle neck of the entire RAID Host Drive.

(b) RAID 4 Host Drives

In principle, the same as in (a) applies to RAID 4 Host Drives, with the exception made for

the parity Logical Drive. The poor performance can have various reasons: the hard disk

forming the Logical Drive

 is too slow (different from the other hard disks with regard to type or manufacturer)

 has wrong parameters (SCSI II, disk cache, tagged queues etc.)

 has too many defects, causing the read/write actuator to have to move to alternate tracks

very often

When setting up RAID 4/5 Host Drives, please observe the notes on RAID 4/5 Host Drives

exposed in the chapter

GDTSETUP in Detail

1 2 ... 159 160 161 162 163 164 165 166 167 168 169 ... 217 218

Sin comentarios

Adaptec GDTSETUP Manual de usuario Pagina 164