Compaq Infortrend Manuale Utente

Power off all hard drives and controller, and power them on again.
Hard drives will not spin-up all at once.  The controller will spin-up
the hard drives one at a time at the interval of four seconds.

Sets the delay time before the controller tries to access the hard
drives after power-on.  Default is 15 seconds.

Choose “Disk Access Delay Time,” then press [ENTER].  A list of
selections displays.  Move cursor bar to a selection, then press
[ENTER].  Choose Yes in the dialog box that follows to confirm the
setting.

The “SCSI I/O Timeout” is the time interval for the controller to
wait for a drive to respond.  If the controller attempts to read data
from or write data to a drive but the drive does not respond within
the SCSI I/O timeout value, the drive will be considered as a failed
drive.

When the drive itself detects a media error while reading from the
drive platter, it usually retries the previous reading or re-calibrates
the head.  When the drive encounters a bad block on the media, it
reassigns the bad block onto a spare block.  However, it takes time
to perform the above actions.  The time to perform these operations
can vary between different brands and models of drives.

During SCSI bus arbitration, a device with higher priority can utilize
the bus first.  A device with lower priority will sometimes receive a
SCSI I/O timeout when devices of higher priority keep utilizing the
bus.

The default setting for “SCSI I/O Timeout” is 7 seconds.  It is highly
recommended not to change this setting. Setting the timeout to a
lower value will cause the controller to judge a drive as failed while
a drive is still retrying, or while a drive is unable to arbitrate the
SCSI bus.  Setting the timeout to a greater value will cause the