Bug#444271: Slow hard drive performance on IOP32x (ARM)
Several users of Debian on Thecus N2100 have reported (see  and
) that their hard drive performance goes down significantly after
moving from the original firmware to Debian.
It goes from something like:
| Timing cached reads: 424 MB in 2.00 seconds = 212.00 MB/sec
| Timing buffered disk reads: 158 MB in 3.01 seconds = 52.49 MB/sec
| Timing cached reads: 60 MB in 2.00 seconds = 29.95 MB/sec
| Timing buffered disk reads: 60 MB in 3.07 seconds = 19.53 MB/sec
This also happens with 2.6.23.
I found that Intel has some patches for the DMA engine that are
required to get the original speed.