Re: SATA software RAID-inkernel vs hardware

From: Miroslav Lachman (000.fbsd_at_quip.cz)
Date: 10/26/05

  • Next message: Brian Candler: "Re: Web Hosting - IPs, Quotas and Jails" 
    Date: Wed, 26 Oct 2005 15:55:27 +0200
To: FreeBSD-ISP <freebsd-isp@freebsd.org>

    Marcin Jessa wrote:
    > Hi guys.
    >
    > I need to set up a server with two RAID1 SATA drives to do mirroring.
    > I was wondering if there was any point in using software RAID
    > controllers like FastTrak S150 TX4.
    > I've found some info avaliable for Linux and people say kernel raid is
    > as good as any BIOS raid. Would that be true for FreeBSD as well?
    > Also using a PCI card for the disc drives in place of the built in SATA
    > interface may degrade performance, since the built in SATA is probably
    > on a different PCI bus to plug in cards.

    AFAIK built-in RAIDs on cheap mainboard are on the same bus, as plug in
    PCI cards sharing same IRQ. Some manufacturers are explaining this in
    manuals.
    Few months ago I was testing built-in SATA RAID on older ASUS board
    (with Silicon Image onboard SATA RAID). BIOS RAID was unstable and I was
    not able to found why. Then I setup gmirror which was OK.
    But all was just home testing, never used in production.

    > So what would you guys suggest? Keep the card or go for inkernel
    > implementation?
    >
    > Marcin.

    So my suggest is real HW RAID card (if you have money), or gmirror, but
    not onboard "pseudo raids".

    Miroslav Lachman
    _______________________________________________
    freebsd-isp@freebsd.org mailing list
    http://lists.freebsd.org/mailman/listinfo/freebsd-isp
    To unsubscribe, send any mail to "freebsd-isp-unsubscribe@freebsd.org"

  • Next message: Brian Candler: "Re: Web Hosting - IPs, Quotas and Jails"

    Relevant Pages

    • Re: 3ware escalade 8006 SATA RAID recommendations; dual boot windows
      ... Doesn't command queing bring SATA much closer to SCSI performance? ... to another manufacturer's SATA RAID controller fail? ... both the disk drive and the adapter card are Frankenstein hardware. ...
      (Debian-User)
    • Re: Stable on Supermicro server?
      ... and a mail server. ... The SATA RAID controller, although it provides a 'legacy' option ... 2 ports with 2 removable, ...
      (freebsd-stable)
    • Re: How to tell DP35DP BIOS version before buying CPU?
      ... I now have the latest BIOS, my CPU now shows 3.0Ghz and 4GB ... a single SATA HD that I want to load Windows on. ... IDE, RAID or AHCI. ... Which version of Windows are you trying to install? ...
      (comp.sys.intel)
    • Re: CD writing in future Linux (stirring up a hornets nest)
      ... How do you share a raid between two systems? ... I remember systems setup that way with scsi in the ... Intel part #82544 in hard drives: ... Considering that USB 1.0 used a shielded cable, it seems unlikely that SATA ...
      (Linux-Kernel)
    • Re: SATA Western Digital Caviar HD install and set up problems
      ... The F6 option may be required when you initially install win, ... Your mobo can utilise two forms of raid using two different drivers, ... successfully using raid sata there is no need for the other. ... Disconnecting the WD allows Windows to boot again. ...
      (microsoft.public.windowsxp.hardware)