I have wondered whether I'd have been better off with 2x Promise TX2s?
I don't know where the bottleneck is with 4xSATA disks on a single Promise/PCI slot
I have 4 x Seagate 160GB SATA connected on a Promise SATA150 TX4. The bottleneck is always the PCI bus:
o 66 MHz PCI bus (266 MB/s): I reach 209 MB/s (79% of theoretical bandwidth) o 33 MHz PCI bus (133 MB/s): I reach 100 MB/s (75% of theoretical bandwidth)
Note: each disk is able to generate a datas rate of about 57 MB/s.
-- Marc Bevand http://www.epita.fr/~bevand_m Computer Science School EPITA - System, Network and Security Dept.
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