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Hello All, I just installed linux kernel 2.4.12 on some test PowerEdge 2550 boxes, with a PERC 3/Si Raid card (4x 10krpm scsi u160 disks, 128Mb cache, one raid5 volume, using domsch/adaptecs aacraid driver). Previously (using 2.4.2 & 2.4.9) the raid volume had a very disapointing read spead of around 22 Mb/sec (a single disk is faster!). You can imagine my suprise when i installed 2.4.12, and the read speed went up to around 60 Mb / Sec ! I tested this speed increase with hdparm, bonnie+, and various 'real life' applications, and it truely is a lot, i repeat _a lot_ faster for me. I don't know what changed in the block layer between then and now, but please don't change it back ! ;-) -- Chris Chabot - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ | ||||||||||||
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