Re: mixing IDE and SATA hard drives on a FreeBSD system

From: Chad Leigh -- Shire.Net LLC (chad_at_shire.net)
Date: 05/05/05

  • Next message: fbsd_user: "RE: Clock running fast" 
    Date: Wed, 4 May 2005 16:06:19 -0600
To: Andrew L.Gould <algould@datawok.com>

    On May 4, 2005, at 3:27 PM, Andrew L. Gould wrote:

    > On Wednesday 04 May 2005 03:25 pm, Chuck Robey wrote:
    >
    >> Andrew L. Gould wrote:
    >>
    >>> My AMD K6-2 computer is in the shop getting upgraded to AMD64. If
    >>> FreeBSD 5.4 is released next week, the timing couldn't be better.
    >>>
    >>> I was thinking about putting FreeBSD and swap on the ATA100 IDE
    >>> hard drive and installing a SATA hard drive for home and database
    >>> data. Is there any reason I shouldn't mix hard drive types? (I've
    >>> never messed with SATA before.)
    >>>
    >>
    >> YMMV, but for myself, I notice that SATA is notably less reliable
    >> than straight SCSI drives are. Less than Ide also. I don't know
    >> why.
    >>
    >>
    >>> Thanks,
    >>>
    >>> Andrew
    >>>
    >
    > Thanks for the warning. I just did a google search on "sata
    > reliability" with lots of interesting results. The expected lifespan
    > (MTBF) of a sata is lower than the scsi; but I haven't found any
    > comparisons to ide yet.
    >

    they should be the same as IDE as almost all the SATA drives use the
    same mechanisms as their comparable IDE brethren. SATA is just the
    interface. SCSI drives are different in that the market for the SCSI
    interface also demands a different mechanism. They could, if they
    wanted to (and used to) add SCSI interfaces to the same mechanisms as
    the IDE mechanisms and you'd have a lower SCSI MTBF

    Chad

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