Am 29.07.2008 um 23:04 schrieb Eduardo Grosclaude: On Tue, Jul 29, 2008 at 1:23 PM, Lanny Marcus <lmmailinglists@xxxxxxxxx> wrote: Eduardo: To give you something else to consider, as an alternative: I
believe there was a long thread here, awhile back, about using
Software RAID, instead of fake RAID controllers. Software RAID works
very well, as I recall from reading that thread. Possibly look into
changing to Software RAID. Depends on the HW RAID controller.
Yes, I finally ended up installing software RAID because
1) I have read that, even if I installed the proper driver, Linux only uses it to configure its own dm software RAID device according to the BIOS conf-- is this completely true? If yes, no real offloading anything to hardware anyway-- even under Windows; does anybody know about this for sure?
2) I am very scared by non-kernel-tree-blessed modules which have their own install procedures and/or updating schedule, I have been bitten by this in the past.
I finally did setup two 1-RAIDed identical partitions and installed the system on the rest of both disks... Now my system won't boot if one disk is broken, but I hope I can go rescue into the data. I was formerly hoping to rely on RAID to protect the full install and simplify my life, but I was discouraged away by 1) and 2).
I have yet to see a real RAID controller... At what price do they start off?
For two channels, there's little that is worth paying for, IMNSHO. 3Ware 8006 is only SATA-one, not SATA-II (two), which brings its own set of problems. For four channels: See www.areca.com.tw for models and use your local search engine to find a good offer. It's not cheap, but you get top performance. I see that they now also offer a two channel SATA-II RAID controller - newegg lists it for 180 USD. Software RAID gets more attractive every day... I can also recommend their 8 and 12 port controllers - but as discussed last time, the more disks you add, the less flexible hardware-RAID (and Linux) get and Solaris/ZFS make more sense then (16 disks upwards IMO). If your storage needs are not constantly growing, Linux is OK.
cheers, Rainer
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