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HPT370/372/372A Red Hat Linux Installation Guide

4 Monitoring the Driver

Once the driver is running, you can monitor it through the Linux proc file system support.

There is a special file under /proc/scsi/hpt37x2/. Through this file you can view driver status

and send control commands to the driver.

Note

The file name is the SCSI host number allocated by OS. If you have no other SCSI cards

installed, it will be 0. In the following sections, we will use X to represent this number.

Using the following command to show driver status:

# cat /proc/scsi/hpt37x2/X

This command will show the driver version number, physical device list and logical

device list.

A RAID 1 array or a RAID 0/1 array may become critical after a disk member fails.

When an array is in critical status, it will loss the ability of fault tolerance until you

finish rebuilding.

Generally rebuilding will automatically start if you have a spare disk for the RAID 1

array or you have replaced the failed disk. In these cases, the array needs to be

synchronized to ensure data consistency. If the array is broken, you must first add a disk

to the array. To add a disk to an array and start rebuilding, you can use the following

command:

# echo " hpt rebuild a b,c,d" > /proc/scsi/hpt37x2/X

In the command, " a" is array number shown in the logical device list. " b" is controller

number (always 0 if you have one HPT37x controller installed), " c" is bus number (0 for

primary channel, 1 for secondary channel), " d" is device number (0 for master device, 1

for slave device). E.g.

# echo " hpt rebuild 1 0,1,0" > /proc/scsi/hpt37x2/X

will rebuild the array with logical device number 1 using the secondary master disk on

the controller.

If rebuilding cannot be automatically started, you can use command

# echo " hpt rebuild start" > /proc/scsi/hpt37x2/X

to start rebuilding. To stop the rebuilding process, use command

# echo " hpt rebuild stop" > /proc/scsi/hpt37x2/X

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