[rescue] FreeBSD and ZFS, was Re: 3ware raid

Phil Stracchino alaric at metrocast.net
Wed Jul 27 18:49:23 CDT 2011

On 07/27/11 19:03, Mouse wrote:
>>> The 3ware controllers have JBOD mode that turns all the "hardware"
>>> raid off.
>> Except that 3Ware JBOD mode is not *PRECISELY* JBOD.  It's closer to
>> "a bunch of whole-single-disk logical volumes".
> What, exactly, is JBOD here?
> I don't know the hardware that's been under discussion.  But I do work
> with a machine containing
> twe0 at pci2 dev 2 function 0: 3ware Escalade
> twe0: interrupting at ioapic1 pin 4 (irq 10)
> twe0: 12 ports, Firmware FE7S, BIOS BE7X
> twe0: Monitor ME7X, PCB Rev5    , Achip 3.20    , Pchip 1.30-66 
> and its JBOD appears to be pretty much exactly what I would think:
> direct access to the whole drive.  That machine has some pdcsata cards
> as well, and I've moved disks between pdcsata and twe without needing
> to touch the data on them and it's all Just Worked.

Hmm.  On the 9500S, I couldn't get it to present unadorned raw disks.

  Phil Stracchino, CDK#2     DoD#299792458     ICBM: 43.5607, -71.355
  alaric at caerllewys.net   alaric at metrocast.net   phil at co.ordinate.org
  Renaissance Man, Unix ronin, Perl hacker, SQL wrangler, Free Stater
                 It's not the years, it's the mileage.

More information about the rescue mailing list