John, I would recommend a single cheap SATA drive for the OS and a RAID 5 for /home. I am running 2 servers that serve 30-35 clients each. On each server I have a Seagate 750GB 7.2k for the OS. When the drive craps out and it has in the past, I just reinstall the OS and I am ready to go. As for the /home, I have been trying to get the teachers and students to trust this OS that they have not used before in their life and therefore I needed redundancy for their data. A 15-disc MD1000 raid array did the trick that is shared over NFS between the 2 servers. I had data discs die in the past and the MD1000 rebuilt the array in about 4 hours. Think about the cost also; 4 SAS 300GB for RAID 5 @$330 ea is ~$1300 and another 2 SAS for the OS in RAID 0 or 1 another $600. Total of ~$2000 just for drives. If you go the SATA option, it's just $50 a pop. Take a look here as well: http://www.acnc.com/04_00.html a nice visual representation on RAID levels
Regards Hi all, > > I have come to the conclusion that my single 7k sata disk is too slow to > serve > 25 plus LTSP thin clients. I see high disk writes accompanied by high > CPU wait time. > > My mobo supports SAS. I am wondering what the optimal disk setup is > with regard to speed. Can I get > away with a single 10-15K SAS drive or should I be looking to setup > raid 5, 6, or 10? How about > two disks, a sata for the OS and a fast SAS for /home/ /tmp ? > > I'd appreciate some advice! > > Thanks! > > John > > > -- Nicolas Roussi
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