Re: Fedora support for Adaptec SATA II Raid Controller - 1420SA

From: Aleksandar Milivojevic (alex_at_milivojevic.org)
Date: 07/15/05

  • Next message: Aleksandar Milivojevic: "Re: Fedora support for Adaptec SATA II Raid Controller - 1420SA" 
    Date: Fri, 15 Jul 2005 07:26:06 -0500
To: For users of Fedora Core releases <fedora-list@redhat.com>

    Ronald Nissley wrote:
    > Does FC 4 support this card? Adaptec lists support for Red Hat Advanced
    > Server 2.1 and Red Hat Enterprise Server 3.0, but doesn't mention
    > Fedora. I am looking for SATA functionality as well as RAID 1
    > (mirroring). If you know of other SATA/RAID cards supported by Fedora
    > please reply with that information. 3ware cards were mentioned some time
    > ago, but they're quite out of my budget at $300+.

    I'm only 99% sure, but I don't think the card you got does not have any
    RAID functionality. It's just an ordinary SATA controller with
    specialized driver that does RAID in software. I believe all Adaptec
    cards where they say "HostRAID" are fake-RAID (I guess the "HostRAID"
    name comes from the fact RAID is implemented by the host in software,
    not by the card in hardware).

    There's no such thing as cheap RAID controller. All those stuff that
    you see listed for low price, it's all fake-RAID. Implemented in device
    driver software, not on the card. You'd get exactly the same
    functionality (and often better performance and stability) using regular
    Linux SATA drivers and generic Linux software RAID driver (md driver).
    Either fork $300+ for decent real hardware RAID, or forget about it and
    use generic Linux software RAID driver with whatever controllers/disks
    you already got in your system.

    Unfortunately, marketing people started pasting word "RAID" on almost
    about anything, and often it seems that they had a say in technical
    specs too. These days it is very hard to find out if the card is a real
    RAID controller or fake-RAID just by looking at card's description on
    manufacturers web site (even technical specs are too often plagued with
    "marketing-speak"). Average consumer falls victim to this very often,
    buying additional hardware that is basically something he already got on
    his motherboard: just an regular dumb SATA controller. 

    -- 
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