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Having trouble installing a piece of hardware? Want to know if that peripheral is compatible with Linux?
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If you are saying that you have a U160 scsi drive, that would be its maximum burst data transfer rate, not the sustained data transfer rate with is what hardparm tells you, but I'm not sure if that is what you are asking.
Distribution: Red Hat (8.0), SuSE (10.x, 11.x, 12.2, 13.2), Solaris (8-10), Tru64
7MB/sec does seem a bit slow for a disk drive. (I use USCSI tape drives at work that accept data at a higher rate than that.) Not knowing anything about the configuration of the OS or the hardware, it's a little tough to tell if there's a serious problem here just from looking at the output of few hdparm commands. There are just too many questions one would want to ask. Such as: Do you see numbers like this when you run these tests in single user mode? What do you have on the "slow" drive? etc...