===> root@talisker:/home #dd bs=1000000 count=400 < /dev/zero > foobar
   400+0 records in
   400+0 records out
   400000000 bytes transferred in 27.116 secs (14751438 bytes/sec)


fwiw on this:

mainbus0 (root): SUNW,Ultra-5_10: hostid 80c06346
cpu0 at mainbus0: SUNW,UltraSPARC-IIi @ 440 MHz, version 0 FPU
cpu0: 32K instruction (32 b/l), 16K data (32 b/l), 2048K external (64 b/l)
[ ... ]
satalink0: Silicon Image SATALink 3112 (rev. 0x02)
[ ... ]
satalink0: port 0: device present, speed: 1.5Gb/s
satalink0: port 1: device present, speed: 1.5Gb/s
wd1 at atabus2 drive 0: <ST3120026AS>
wd1: drive supports 16-sector PIO transfers, LBA48 addressing
wd1: 111 GB, 232581 cyl, 16 head, 63 sec, 512 bytes/sect x 234441648 sectors
wd1: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd1(satalink0:0:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
wd2 at atabus3 drive 0: <ST3120026AS>
wd2: drive supports 16-sector PIO transfers, LBA48 addressing
wd2: 111 GB, 232581 cyl, 16 head, 63 sec, 512 bytes/sect x 234441648 sectors
wd2: drive supports PIO mode 4, DMA mode 2, Ultra-DMA mode 6 (Ultra/133)
wd2(satalink0:1:0): using PIO mode 4, Ultra-DMA mode 6 (Ultra/133) (using DMA)
raid0: RAID Level 1
raid0: Components: /dev/wd2a /dev/wd1a
raid0: Total Sectors: 234441472 (114473 MB)

i get:

400000000 bytes transferred in 16.063 secs (24901948 bytes/sec)

writing to the start raw disk gets just over 50MB/sec.  this box
is pretty damn fast for a U10 without SCSI  :-)


.mrg.