Messages in this thread | | | Subject | Promise SX8 driver performance | From | Matt <> | Date | Mon, 29 Nov 2004 14:50:22 -0500 |
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Hello all. I've got a Promise SX8 SATA controller and the performance seems a little off. I'm using a debian-built 2.6.9 kernel and the read/write I/O seems to level off around 80-90 MB/s. When I use the same hardware in Windows, sequential I/O goes up to 218 MB/s. (That's about the limit of my motherboard's buses.) If I move some disks to the on-board SATA controller, I can get the I/O to go higher but never as high as in Windows.
Is this a problem with my expectations, my testing, or the driver?
Some Bonnie numbers for a raid 0 array of Seagate 7200.7's (2 GB file, sequential, MB/s):
Disks/cntl Write Read ----- ----- ---- 1 (sx8) 57 63 2 (sx8) 69 75 2 (ESB) 111 121 3 (sx8) 75 79 3 (1 sx8, 2 ESB) 141 125 4 (sx8) 89 80 4 (2 sx8, 2 ESB) 135 150 5 (sx8) 88 79 6 (sx8) 91 75
Some numbers from Sandra (ugh) in W2K Pro with the latest Promise drivers and using software RAID 0 (sequential, MB/s):
Disks/cntl Write Read ----- ----- ---- 1 (sx8) 56 62 2 (sx8) 106 122 3 (sx8) 151 176 4 (sx8) 178 209 5 (sx8) 180 218 6 (sx8) 179 218 6 (4 sx8, 2 ESB) 169 207
My full hardware:
Supermicro P4SCi motherboard (7210 chipset, 6300ESB SATA on-board) 3.0 GHz P4 Northwood w/ HT enabled (2) 512MB DDR400 dual channel (non-ECC) Promise SX8 SATA controller (6) 200 GB Seagate 7200.7 (1) 40 GB Seagate Baraccuda IV (boot) Adaptec 2940U
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