[blue68f100]

Snap Appliance used IBM/Hitachi drives depending on the age.

tta013: From the info you gave me, Drive 1 is having a problem. It should show a problem on the front panel.

Run the cmd "info devices" from bebug. It will give you a detail report of your drives.

In a raid5 config. All data is spread across the array. Each drive contains parity data on the other drives. So if one fails. The data is not lost. But not be accessable till a replacement drive is replaced and the array rebuilt.

IF YOU REPLACE THE WRONG DRIVE ALL DATA MAY BE LOST. So you need to know which drive is having the problem. One the drive is replaced and set as a HOT Spare the OS will use it to rebuild the array.

I think the 4200 has seperate controllers for each drives. Drive ID's are like this: 10000, 10007, 10010, 10017, where raid 0 = 40000, raid 1 = 50000, raid 5 = 60000. There are other drive id that reference to system directories.

As a rule of thumb on raid systems. All drives need to be the same size (with in 2-3%) and config ( head, cyl, cache ...).

I assume that you have Snap OS and NOT Guardian.

I hope this clear some things up for you. The wiki section has a link to Adaptec if you need the admin manual.