-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Am Freitag, 26. November 2004 15:53 schrieb Liam Marshall: > I would like to get a Promise IDE raid controller, either the 4 or 6 > channel version, haven't decided yet. I was going to put on it 4 - 80 > GB EIDE hard drives with 7200 rpm and 8MB cache each. I would use these > in a raid 0+1 or raid 1+0 configuration. It is my understanding that > this will give me the best of both mirroring for redundancy, and > parity/spanning for performance.
I don't know those well, but you should probably check beforehand wether those are _fully_ supported by Linux. You should also check wether they behave like SCSI controllers to the system (hiding raid details) or the RAID is a software solution - because the latter can be done much cheaper with PCI IDE controllers and LVM. However those IDE controllers mimicking SCSI can give real nice results, especially comparing SCSI price per GB to EIDE. > If I am right in my understanding of raid levels 4 - 80GB drives in such > a configuration will give me 160GB of storage space, with the other > 160GB of the drives being used in a mirrored capacity right? I think that's right. If you have the option money-wise and the controller supports this, you should better choose a RAID-5. Those have parity (redundancy information) scattered over all drives as well, with any single drive being independant. Would make the same security as RAID1+0 or RAID0+1 (It probably does not matter which order those RAIDs are cascaded - try to get a manual of the controller you plan to buy before actually buying and check how it supports what you want), but afaik is a bit faster.... ymmv. > Opinions? Comments? > > I am leaning with EIDE solution because of price vis a vis scsi and > because sata really isn't available in my area yet and is still fairly > expensive/unsupported? > > Opinions? Comments? As it is also a matter of price, I'd choose EIDE as well. SCSI may be faster and nicer :-) but you cannot get 320G scsi for below 800� or so. This becomes even more impressive with larger discs, as large EIDE discs are real cheap in comparison. Anselm -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.2.4 (GNU/Linux) iD8DBQFBp1RzRGDyvz+XrnkRAqHRAJ4hS58byiLRCexM2/XQgqrnAHhA7QCfegHy 0POcAU3vwa2TqRAHhIxR+es= =2NUO -----END PGP SIGNATURE----- ------------------------------------------------------- SF email is sponsored by - The IT Product Guide Read honest & candid reviews on hundreds of IT Products from real users. Discover which products truly live up to the hype. Start reading now. http://productguide.itmanagersjournal.com/ _____________________________________________________________________ Ltsp-discuss mailing list. To un-subscribe, or change prefs, goto: https://lists.sourceforge.net/lists/listinfo/ltsp-discuss For additional LTSP help, try #ltsp channel on irc.freenode.net
