Am Donnerstag, 13. Oktober 2011 schrieb Dan Ritter: > On Thu, Oct 13, 2011 at 06:06:38PM +1000, yudi v wrote: > > Hi all, > > > > Just a quick question about RAID and linux file systems. I am > > building a new desktop and wondering what the best configuration to > > get redundancy and speed. > > Some thing like ZFS RAID1 or RAIDz. > > > > I am not going with SSDs as they are beyond my budget. I believe I > > can get the required performance from 7200 HDD using RAID with added > > redundancy and enough storage space without the price penalty of > > SSDs. > > You don't say what your storage requirements are and what your > performance requirements are. > > You might consider a small SSD and a pair of N-terabyte hard > disks in RAID1. Put performance-critical things on the SSD, and > keep a backup on the hard disks, along with > non-performance-critical data. > > I've assessed my desktop data usage, and I think I can get away > with a 120G SSD and a single 1 TB spinning disk, using rsnapshot > to copy the SSD a few times a day.
For the desktop a mixed setup can make sense, since there is no need to store movie or music files onto an SSD usually. SSD excel at random I/O workloads with lots of small files. Seagate - possibly others - manufactures a harddisk with SSD cache. This might be an alternative for laptops. But AFAIR the SSD is only 4 GB on that Seagate drive. Dunno whether it will make much of a difference. For Linux there is bcache in development - not yet in mainline - which can use a fast drive like an SSD to cache slower drives or parts of them. Ciao, -- Martin 'Helios' Steigerwald - http://www.Lichtvoll.de GPG: 03B0 0D6C 0040 0710 4AFA B82F 991B EAAC A599 84C7 -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/201110132131.15251.mar...@lichtvoll.de
