Thanks for the quick replies. Some more info. I am backing up 22 SCO boxes that have 9gb total space each. I also have 6+ LINUX servers with 75gb drives. The SCO Master backups are not 9GB total but more like 4GB since the system was originally built to run on a 1GB drive.
I have to stay with the SAS drives as the current RAID enclosure is SCSI but I will rethink the RAID Level. I will have to dig out the manual on my LSI card to see what levels it supports. On Fri, May 16, 2014 at 4:03 PM, Doug Hughes <d...@will.to> wrote: > If you have a 24x7 work cycle, avoid the green drives. They won't last. > Red drives are reasonable and there are a lot of articles out there on the > web about people using the red drives in production for 24x7. They > generally have a 3 year warranty. If you expect to be doing active caching > or other high-intensity workload, I'd go with the black drives. > > > > On Fri, May 16, 2014 at 3:36 PM, Dan Ritter <d...@randomstring.org> wrote: > >> On Fri, May 16, 2014 at 03:23:13PM -0400, john boris wrote: >> > I have to rebuild my remote Backup Server (A place for my servers to >> backup >> > to hard dirves). I currently have a LINUX system with a RAID 5 array of >> > 300GB SAS drives (Total 1.5TB) which has to be increased to 4TB or >> larger >> > (sorta depends on the cost) We are virtualizing 22 of my servers which >> > currently use on board tapes for Master Backups and then do >> differentials >> > each night to my Backup Server over our WAN at night. Because this >> server >> > will now be holding Master Backups I need to grow the space. I don't >> have >> > the money nor budget to get any dedupe system or some other appliance. >> > >> > I started looking for drives and hit the smorgasbord of Green/Red >> 32mb/16mb >> > cache and the prices are all over the place. I can get a 1TB drive for >> $133 >> > (approx) but the 500GB drive is $270 with a smaller cache. Same >> > manufacturer and distributor. My RAID system has 8 slots which I want to >> > use. There will be two arrays in the system. RAID1 (Mirrored for the oS) >> > and the rest of the slots for RAID 5. Currently it is all one big array >> and >> > also uses LVM which I am not going to use when I rebuild this thing. >> > >> > So I am looking for some insight on what performance specs I should be >> > looking for in such a project. I must confess as I type this I probably >> > will also look at a NAS unit that would be comparable size and cost. >> > >> > My systems use a Backup program from Microlite (BackupEdge) which works >> > just fine for what we do and hasn't failed me yet. (looking for some >> real >> > wood to knock on). >> >> You have a backup server, it has 8 3.5" SAS/SATA disk slots, and >> you want to backup 22 machines nightly? >> >> You don't want RAID5. Use RAID10. 6 x 3TB will get you 9TB of >> usable space, and a rebuild on a failed drive will involve much >> less overhead. Your NICs are likely to be the bottleneck. >> >> The per-disk cache is not going to be interesting, because backups >> are large contiguous writes and large contiguous reads. SAS vs SATA >> isn't going to help unless you're buying dual-port drives for controller >> redundancy, which you didn't mention. 7200RPM SATA disks with a 5 year >> warranty run about $200 each. (WD Black at NewEgg.) >> >> -dsr- >> _______________________________________________ >> Tech mailing list >> Tech@lists.lopsa.org >> https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech >> This list provided by the League of Professional System Administrators >> http://lopsa.org/ >> > > > _______________________________________________ > Tech mailing list > Tech@lists.lopsa.org > https://lists.lopsa.org/cgi-bin/mailman/listinfo/tech > This list provided by the League of Professional System Administrators > http://lopsa.org/ > > -- John J. Boris, Sr. Online Services www.onlinesvc.com
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