External SCSI storage tower not showing up in Windows 2003

Posted on 2007-07-25
Last Modified: 2010-04-03
Hi all, I have an infortrend eonstor external SCSI storage tower which is connected to two servers (one old, one new), both servers detect it and scan the LUN's OK and even show the device name (U12U-G3A3), however I can only get one server to register it as a hard drive and therefore access the data storage. The other server just doesn't pickup the device in device manager or disk management. The SCSI card that it is connected to in the new server is an Adaptec 7902 Ultra 320 and the server OS is Windows 2003 Standard R2. I was hoping someone would have some ideas so I can get this drive to show up in windows on this new server. Thanks.
Question by:scotttiamit
    LVL 11

    Expert Comment

    just want to check with you.. can you just unplug and the one that is the old server and try to connect back to the new one and see if tht can pick if there is only one server and it can pick up in the new one.


    Author Comment

    I am sorry mate that doesn't really make any sense to me, there is nothing wrong with the cables etc, the SCSI storage device does not detect the connections, it is the servers that detect the connection to the SCSI storage device. Both servers are detecting the SCSI storage device fine. I am guessing it is a setting in the SCSI card setup (although I have had a look and even reset to defaults), or a windows problem maybe. The Adaptec SCSI driver is installed on the new server and there are no hardware issues. I am not sure what else to try.
    LVL 55

    Expert Comment

    Are you trying to get the same disk seen by both systems? Doesn't make sense since Windows 2003 standard doesn't support clustering. You either need Windows Enterprise or create a seperate array for the other server. I've only played with their single host interface boxes but I was under the impression that with dual host ones didn't support clustering, just telling the controller which SCSI interface to present the storage on.

    Author Comment

    I ended up losing the connection from the main machine. It turns out the connecting two machines to the one storage device (both connections using the same data partition) caused data corruption even though this is listed as a feature in the product manual. I had to plug in a usb hard drive and do data recovery and restore all the data to the usb hard drive. I then had to delete the partition and reset it up from scratch, then copy the data back to the eonstor. It was a major hassle and took days before we were up and running properly. We also had some data corruption to files remaining. Backups for several days also contained corrupt data so the recovery was a must.
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