Re: SATA support at the kernel level?



On Wed, 27 Sep 2006, John-Paul Stewart wrote:

***** charles wrote:
does anyone make a
good pci sata2 hardware based raid card for Linux?

3ware does, but they're rather pricey. Keep in mind, though, that the cheaper cards are "fakeraid" cards (as discussed on the web page the previous poster mentioned) while the 3ware cards are true hardware RAID cards with dedicated co-processors for the RAID parity calculations and such.

Adaptec and LSI Logic also make some good hardware SATA RAID cards, too.

My experience is that the 3Ware cards have performance that is way better than the Adaptec cards. I am comparing true hardware RAID cards (Adaptec 2820SA and 3Ware 9550SX)

It is possible that the performance issues that I have seen with the Adaptec cards are more to do with the type of access (many small files being read/written).

I did read today a comment that the adaptec cards are affected by the management utility and that performance can be improved by stopping this process. I have yet to try this.



.

Relevant Pages

  • Re: well-supported SATA RAID card?
    ... with any SATA RAID cards with at least 6 ports... ... utilities are there on freebsd, ... reliability, rebuild speed, and management tools) but the performance ...
    (freebsd-stable)
  • Re: FW: [SLE] Promise Driver - SUSE - ENT 9
    ... I use 3ware raid cards here both ide an sata with no problems with suse. ... Have one of the 3ware sata raid cards in server here running 9.,2 ...
    (SuSE)
  • Re: Very strange issues
    ... suggestions as to card/raid specific settings ... Were these hardware/cpu equiped raid cards - usually costing approx ...
    (microsoft.public.windows.file_system)
  • Re: filesystem corruption with 1TB filesystem, 4.9-STABLE, twe
    ... > Can you rule out hardware problems by substituting in a different ... Usually we use SCSI RAID cards. ...
    (freebsd-stable)
  • Re: OT: Sparc not dead yet
    ... hardware, would make hardware more expensive, then maybe you need to ... that capability is already in VMS supported hardware. ... plates that hold in the 'PCI' cards. ... would be to hot-swap the cards and then just have FailSafe on some ...
    (comp.os.vms)