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What Sustained Disk Transfer Rates Do You Get?

Posted by Cliff on from the hard-drive-benchmarks dept.

Mr. Jackson asks: "What kind of disk transfer rates (MB/s) do people get in the real world when moving around large (100s MB) files? Either every machine in our building is mis-configured, or our notions about what we were getting are way off. I've tested half a dozen machines, mostly Win2k, some Linux, by just copying a large file and timing it with a watch. 8 MB/s seems to be about average for inter-disk copies. RAID 1 (stripped) got as high as 12 MB/s after fiddling with cache settings. RAID 5 was as low as 2 MB/s. We all thought the numbers should have been around 30 MB/s."

2 of 94 comments (clear)

  1. It's funny, laugh. by Futurepower(R) · · Score: 0, Offtopic

    +1 Funny, NOT off topic! It's funny, laugh.

  2. IDE vs. SCSI by mbyte · · Score: 2, Offtopic

    Bonnie++ Tests with U160-scsi and IDE:

    IDE promise ATA hardware raid, 2x 80 gb maxtor:
    Version 1.02c ------Sequential Output------ --Sequential Input- --Random-
    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
    Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
    cotopaxi 1G 16356 99 34258 41 9183 7 14602 89 50924 16 351.6 1

    thats 50 mb/sec.

    now 3x fujitsu 15k rpm scsi-u160 drives, running software raid5:

    Version 1.02b ------Sequential Output------ --Sequential Input- --Random-
    -Per Chr- --Block-- -Rewrite- -Per Chr- --Block-- --Seeks--
    Machine Size K/sec %CP K/sec %CP K/sec %CP K/sec %CP K/sec %CP /sec %CP
    stromboli 3600M 9777 84 24733 68 18517 68 11916 98 53297 65 378.1 3

    Again, around 50M/sec ... but don't need to tell you that the 2x80 gb maxtor were quite a lot cheaper ;)