Separate logical drive (RAID 1) or only partition on logical drive (RAID 5) for quorum?

Discussion in 'Clustering' started by Ros, Sep 9, 2004.

  1. Ros

    Ros Guest

    Hi,
    we are setting up new Exchange Server 2003 two node active/passive cluster
    for 250 mailboxes and 500 MB size on ProLiant DL380 G3 Packaged Cluster with
    MSA500 G2 Array (up to 14 SCSI disk drives), where each node is 2x Xeon 3.2
    GHz, 2 GB RAM, 2x72 GB RAID 1 (system and application software).
    http://h18004.www1.hp.com/solutions/enterprise/highavailability/dl380/index.html

    Storage sizing:

    - 250 mailboxes
    - 500 MB per mailbox limit
    - 1,5 adjustment factor for 30 day deleted items retention store
    - 2 adjustment factor for disk space for defragmentation and quick database
    restore

    quorum = 1 GB
    database = 250 x 0,5 x 1,5 x 2 = 375 GB
    log files = 100 GB ??? How calculate this size?

    Disks and RAID configuration:

    What is suggested solution? Create one logical drive on RAID adapter using
    6x146 GB physical drives as RAID 5 and then use the drive letters and NTFS
    partitions for quorum, database and logs or first create three independent
    logical drives on RAID adapter using following physical drives and then
    create partitions?

    quorum = 2x18 GB RAID 1
    database = 6x146 GB RAID 1+0 or 4x146 GB RAID 5
    log files = 2x146 GB RAID 1

    Thanks
    Ros
     
    Ros, Sep 9, 2004
    #1
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  2. Ros

    Prashanth K Guest

    For database RAID 1+0 performance is far better than RAID
    5.

    You can use RAID 1 for logs and Quorum drive.
     
    Prashanth K, Sep 10, 2004
    #2
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