They weren't supposed to be consumer drives. The box was provided by the vendor of a disk-disk-tape backup system.
They are Western Digital Enterprise RE2-GP drives. I wouldn't purchase them again, thanks for asking... Not that this provides any real info to the OP, other than the time it takes to rebuild the array. =Don= On Apr 13, 2010, at 12:24 PM, Drew Weaver wrote: > Those drives are likely fading out of the array because they aren't meant to > be in arrays in the first place, Adaptec has told us that if you use consumer > drives with their cards you are operating at your own risk. > > -Drew > > > -----Original Message----- > From: centos-boun...@centos.org [mailto:centos-boun...@centos.org] On Behalf > Of Don Krause > Sent: Tuesday, April 13, 2010 3:20 PM > To: CentOS mailing list > Subject: Re: [CentOS] 12-15 TB RAID storage recommendations > > > On Apr 13, 2010, at 11:57 AM, nate wrote: > >> John R Pierce wrote: >> >>> well, IF your controller totally screams and can rebuild the drives at >>> wire speeds with full overlap, you'll be reading 7 * 2TB of data at >>> around 100MB/sec average and writing the XOR of that to the 8th drive in >>> a 8 spindle raid5 (14tb total). just reading one drive at wirespeed is >>> 2000,000MB / 100MB == 20,000 seconds, or about 5.5 hours, so thats about >>> the shortest it possibly could be done. >> >> More likely your looking at 24+ hours, because really no disk system >> is going to read your SATA disks at 100MB/second. If your really lucky >> perhaps you can get 10MB/second. >> >> With the fastest RAID controllers in the industry my own storage >> array(which does heavy amounts of random I/O) averages about >> 2.2MB/second for a SATA disk, with peaks at around 4MB/second. >> >> Our previous storage array averaged about 4-6 hours to rebuild >> a RAID 5 12+1 array with 146GB 10k RPM disks, on an array that was >> in excess of 90% idle. Rebuilding a 400GB SATA-I array often >> took upwards of 48 hours. >> >> nate >> >> > > > For a "real life" example, we have a 3 year old 12x 1TB SATA box using an > Adaptec RAID controller, doing RAID 6 that takes about 3 days to rebuild the > array each time a drive fails. Which, to date, has happened 10 times... > (Fortunately, this is only a BackupPC box.) > > FWIW, we've not experienced a second drive failure during the rebuild > process, yet. But we have had drives fail within a few weeks of each other, > so it's probably going to happen one of these days.. > > -- > Don Krause > Head Systems Geek, > Waver of Deceased Chickens. > Optivus Proton Therapy, Inc. > www.optivus.com > "This message represents the official view of the voices in my head." > _______________________________________________ CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
