ultra 3 and ultra 2 what happens when connected

[zodiaczz]

Ok here is my situation

Customer old Compaq 330 GL server
3 SCSI Hard Drives
9.1 GB Ultra 2 with 7200 speed
Configured in a RAID 5 array.


One of the hard drives failed, SCSI 1 ID. Sales orders the part. Tech goes on site and finds the drive that failed SCSI 1 ID. Replaces the drive with new one. Turns machine back on and it just sits there at the logical drive discovered and never moves from there.

Find out that the drive was the wrong part, it was a SCSI Ultra 3 10000 speed.

Put the old drive back on and now to at least put it back to the way it was while we wait for correct part.
Problem the drive will not boot anymore off the RAID.
Looking for Boot.ini file, create a BOOTDISK and then it looks for the HAL file. Go into recovery console to copy HAL file over but access is denied to folder and errors coming up un able to connect to directory enumeration, or something like that.

Did research on the error seems that the drive is corrupted, tried everything, fixboot, fixmbr, chksdsk, repair, ERD, nothing. Looks like we will have to do a complete restore and do it from backup.

My question, would the ULTRA 3 drive that was put in cause all this damage? would it freaked out my ultra 2 drives?

 

[buyhptoday]

I have seen this problem onsite also and what seems to happen is when you put the new drive in the raid tried to do a restore automaticly and when trying to discover the new drive. Being ultra 3 and ultra 2 is just a speed issue. This could have freaked out the raid controller but normally the machine would just turn the speed of the ultra 3 10k to the same speed as the ultra 2 7200rpm. What I did and I dont know if it will work for you but I took out one of the other drives and put it in place of the failed on and put the new one in it's place and the raid the a complete rebuild.

Jay

 

[zodiaczz]

Thanks Jay

What did you mean when you said this

What I did and I dont know if it will work for you but I took out one of the other drives and put it in place of the failed on and put the new one in it's place and the raid the a complete rebuild.


It was a little unclear to me on how you worded that phrase.

thanks

 

[MikeBatters]

The geral rule is that you can mix and match transfer speeds (e.g. ultra 2/3/320) within an array and everything will step down to the lowest common denominator.

What you can't do is mix and match different drive speeds RPM speeds.

I suspect that is what has caused your problem and not the fact that you have mixed ultra2 & ultra3 becuase we do this all the time - especially when doing inplace upgraded to entire arrays where we swap out all the disks in an array for new & bigger drives. We just make sure they are the same RPM.

Mike

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