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SCSI ID <--> filesystem - SCO

.... a particular (5.0.6) server has a SCSI backplane with four hard disks hanging off of it. All I know is the SCSI ID (it is the position in the backplane; right-most is ID 0, next is ID 1, and so on). How do I tell which filesystem is on which disk. IOW, how do I match up a given filesystem with its hd's SCSI ID? The best I've come up with so far is to re- run mkdev hd (*it* knows the answer), but that's a little bit nerve-wracking. There must be a better way, right? Thanks! -- _________________________________________ ...

  1. #1

    Default SCSI ID <--> filesystem

    .... a particular (5.0.6) server has a SCSI backplane with four hard disks
    hanging off of it. All I know is the SCSI ID (it is the position in the
    backplane; right-most is ID 0, next is ID 1, and so on).

    How do I tell which filesystem is on which disk. IOW, how do I match up a given
    filesystem with its hd's SCSI ID? The best I've come up with so far is to re-
    run mkdev hd (*it* knows the answer), but that's a little bit nerve-wracking.
    There must be a better way, right?

    Thanks!

    --
    _________________________________________
    Nachman Yaakov Ziskind, EA, LLM [email]awacsegps.com[/email]
    Attorney and Counselor-at-Law [url]http://yankel.com[/url]
    Economic Group Pension Services [url]http://egps.com[/url]
    Actuaries and Employee Benefit Consultants
    Nachman Yaakov Ziskind Guest

  2. #2

    Default Re: SCSI ID <--> filesystem

    Nachman Yaakov Ziskind wrote:
    > ... a particular (5.0.6) server has a SCSI backplane with four hard disks
    > hanging off of it. All I know is the SCSI ID (it is the position in the
    > backplane; right-most is ID 0, next is ID 1, and so on).
    >
    > How do I tell which filesystem is on which disk. IOW, how do I match up a given
    > filesystem with its hd's SCSI ID? The best I've come up with so far is to re-
    > run mkdev hd (*it* knows the answer), but that's a little bit nerve-wracking.
    > There must be a better way, right?
    The tool you want is John DuBois's `divisions`:

    [url]ftp://ftp.armory.com/pub/admin/divisions[/url]

    Try `divisions -tu`.
    >Bela<
    Bela Lubkin Guest

  3. #3

    Default Re: SCSI ID <--> filesystem

    Nachman Yaakov Ziskind wrote:
    >
    > ... a particular (5.0.6) server has a SCSI backplane with four hard disks
    > hanging off of it. All I know is the SCSI ID (it is the position in the
    > backplane; right-most is ID 0, next is ID 1, and so on).
    >
    > How do I tell which filesystem is on which disk. IOW, how do I match up a given
    > filesystem with its hd's SCSI ID? The best I've come up with so far is to re-
    > run mkdev hd (*it* knows the answer), but that's a little bit nerve-wracking.
    > There must be a better way, right?
    >
    > Thanks!
    >
    > --
    > _________________________________________
    > Nachman Yaakov Ziskind, EA, LLM [email]awacsegps.com[/email]
    > Attorney and Counselor-at-Law [url]http://yankel.com[/url]
    > Economic Group Pension Services [url]http://egps.com[/url]
    > Actuaries and Employee Benefit Consultants

    With the system idle, try writing a large file to each filesystem and
    see which drive lights up ( assuming there is an LED for that ).

    Some RAID controllers can remap the reported SCSI ID to the real ID,
    which can be confusing. Some versions of DPT did move the first
    defined array to a reported SCSI ID of 0, even if the drives where
    at 2 & 3 !

    Mike

    --
    Michael Brown

    The Kingsway Group
    Mike Brown Guest

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