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

[Phil Stracchino]

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 1.05.00.065, BIOS BE7X 1.08.00.048
> twe0: Monitor ME7X 1.01.00.038, 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.