Dependable DASD - Getting Out of the Cabnet and Away from Sun Drives

Posted on 2006-05-09
Last Modified: 2013-12-27
We're running an E450 with all of the internal drive bays populated (20 total).  The config is RAID 0.  Lately, we've been having issues with the drives getting our of sync.  Metastat comes up with "drive needs maintenance" - we then run metareplace to sync up the drives.

This has happened a bunch since we added some drives.

We're looking into the firmware on the Sun drives that we purchased, but I was wondering if we could move away from the "in the cabnet" Sun scsi drives to something like a rack mounted seta nas or something with readily available, hot swappable high performance drives in a raid config that the Sun E450 will recognize and be able to utilize.  
Question by:bhunger
    LVL 14

    Accepted Solution

    First, I would be very concerned about the "out of sysnc" messages, they are usually a precursor to a major drive failure.
    If you have Sun service on the machine, you should open a call, they can then tell you what needs to be done to correct the cause of the messages.

    Also, are you sure you are running RAID 0?  RAID 0 provides no data protection, and is used only to make a group of smaller drives appear as a snigle large drive.  In the short term it seems like a cheap solution, but if you are running all 20 drives as a single RAID 0 array, the failure of just one drive will make all the data unreadable, and unrecoverable.

    There are several Sun solutions for adding  external disk arrays, this page lists Sun's current offerings;

    You might also think about a second had solution.  I have had very good luck with Sun's A1000 and D1000 arrays
    If you do a search on eBay for "Sun a1000" or "Sun d1000" you will see many available with different size disks.  The difference between them is that the a1000 is a hardware raid and requires seperate software to manage, while the d1000 is just a group of scsi disk drives that you would manage similar to the internal drives.

    In the long run (in my opinion) the internal drives provide the best technical solution, but you should be using your 20 drives as several RAID 1 or RAID 5, arrays.

    If you post and excerpt of the error log and a description of the disk layout, you may get a little more help.

    Good Luck!

    Author Comment

    Sorry, my mistake, RAID 1.  I'll get the log info and post. Thanks.

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