User manual

FastTrak SX4100 User Manual

• If your data retrieval consists of fixed-size data blocks, such as some

database and video applications, choose that data block size as your stripe

block size.

Generally speaking, email, POS and webservers prefer smaller stripe block

sizes. Video and database applications prefer larger stripe block sizes.

Gigabyte Boundary

This feature is for fault tolerant logical drives (RAID 1, 5 and 10). When a disk

drive has failed and the user cannot replace the drive with the same capacity or

larger, this feature permits you to install a replacement drive that is slightly

smaller (within 1 gigabyte) than the remaining working drives. This can be helpful

in the event that a drive fails and an exact replacement model is no longer

available.

You must set the Gigabyte Boundary feature to ON when you create your logical

drive. Gigabyte Boundary rounds the capacity of all disk drives to the common

whole GB drive size. For example, with the Gigabyte Boundary feature enabled,

the remaining working drives can be 80.5 GB and the replacement drive can be

80.3, since all are rounded down to 80GB. Note that the rounding function will

cause you to lose a small amount of capacity from each disk drive.

Initialization (Fast Init)

This function erases the Master Boot Record (MBR) in all of the selected disk

drives. Use this function when one or more disk drives has been used in a

previous logical drive.

Hot Spare Drive

Any extra drive that is not assigned to an logical drive is designated Free in the

View Drive Assignments screen (see below). In order for a free drive to serve as

a hot spare drive, you must designate the free drive as a spare using the

WebPAM software.