Todd Denniston wrote:
Roger Heflin wrote, On 03/24/2008 02:20 PM:
edwardspl@xxxxxxxxxx wrote:
Alan Cox wrote:
On Sun, 23 Mar 2008 15:39:22 +0800
edwardspl@xxxxxxxxxx wrote:
Dear All,
Which model / type of ATA Raid card controller is good for work
with New FC System ?
Would you please recommend ?
Almost every 'raid' controller for ATA devices is just driver level
raid,
so equivalent to using the built in lvm/md raid support that works with
any devices. At the high end there are a few hardware raid cards but
they
rarely outperform ordinary ATA on PCI Express.
Edward,
The cheapest 4-port raid cards are typically $300US, the 8-port cards
are quite a bit more. If you are a home user I would suggest not
wasting your money on the HW raid, and has others mentioned it is not
really worth the extra money for a home user, so use software raid.
Most of the cheaper cards are fakeraid and at best (if supported under
DMRAID) are only slightly better than software raid.
Roger
So would the better question be:
Which model / type of ATA multi-port card controller is good when you
want to do software RAID with New Fedora System?
i.e. which manufactures cards that you can hang 4+ drives off of, have
enough independence[1] between drives, that doing software RAID works
fast[2]?
Can you get 4+ port SATA cards that don't claim to be "RAID" cards?
Or has everything already been said here:
http://linuxmafia.com/faq/Hardware/sata.html
http://linux-ata.org/faq-sata-raid.html
[1] I am making the old assumption that ATA drives on the same bus slow
each other down. Does that really matter with SATA?
[2] assuming the controller card is more likely to be the bottleneck
than the processor, PCI bus, or drives.
Hi!
http://linux-ata.org/driver-status.html#matrix
I would buy a card which drivers have the most features.
I chose a cheap "Silicon Image"-chipped sata1 card (sata_sil driver).
Hotplugging etc is working fine.
The sata_sil24 is the SATA2 chip.
-Tom
