Hi all, I subscribe to the ALINKA clustering newsletter (weekly summary of several mailing lists) and not to Bioclusters, per se, and saw your discussion of the 3ware RAID controllers (that is to say, cc me directly if you have any more questions). First off, there's a linux-ide-array mailing list at lists.math.uh.edu. It's majordomo so the standard subscription rules apply. Secondly, we (SDSS) have ~30 3ware controllers in-house which account for ~20TB of storage space. Other groups here at Fermi have more. Some have less. There's a bunch of us, in any case. Using RAID50 (2 controllers - hw RAID5, sw RAID0) we're getting ~110MB/s block writes and >200MB/s block reads for large (2-4GB) files. However, these are using the SuperMicro P4DC6+ mobo which have the broken i860 chipset (broken, in that the PCI bandwidth is limited to something like 220MB/s, there's a kludgy fix but that only ups it to ~300MB/s). One of the members on the linux-ide-array list has reported >325MB/s reads using the SuperMicro P4DPE mobo, which has the E7500 chipset. Anyway, I've been maintaining a technical document about my experiences (patch sets, compilation parameters, benchmarks, etc.). I try to keep it complete but concise: http://home.fnal.gov/~yocum/storageServerTechnicalNote.html and another group at the Lab has there own findings here: http://mit.fnal.gov/~msn/cdf/caf/server_evaluation.html They've been having some problems with multiple clients hitting the machines and are considering trying another FS (they use ext3, currently). I use XFS and am VERY happy with it, but only a few (<5) processes hit the machines at a time. Hope this helps, some. Cheers, Dan -- Dan Yocum Sloan Digital Sky Survey, Fermilab 630.840.6509 firstname.lastname@example.org, http://www.sdss.org SDSS. Mapping the Universe.