>>> I bought two 200GB Seagate Barracuda 7200.7 SATA discs

>>> piixide1: Intel 82801EB Serial ATA Controller (rev. 0x02)

>> (The above sector is at the 128GB mark on the disk... I wonder if
>> there is something special about that?

> Its a seagate disk isn't it? Some seagate disks can only access
> the last 'pre LBA48' sector via LBA48. There is a quirk table
> in NetBSD, but really NetBSD should try LBA48 on that sector
> if non LBA48 fails.

Seagate 7200.8 250 GB SATA connected to a
satalink0: Silicon Image SATALink 3512 (rev. 0x01)
Alpha 164lx running NetBSD 2.0.2

sopwith # dd if=/dev/rwd0c of=/dev/null bs=512 skip=268435000 count=10000
dd: /dev/rwd0c: Input/output error
455+0 records in
455+0 records out
232960 bytes transferred in 3.730 secs (62455 bytes/sec)
sopwith # dd if=/dev/rwd0c of=/dev/null bs=512 skip=268435455 count=1  
dd: /dev/rwd0c: Input/output error
0+0 records in
0+0 records out
0 bytes transferred in 3.536 secs (0 bytes/sec)
sopwith # dd if=/dev/rwd0c of=/dev/null bs=512 skip=268435456 count=100
100+0 records in
100+0 records out
51200 bytes transferred in 0.057 secs (898245 bytes/sec)
sopwith # 


wd0c: error reading fsbn 268435455 (wd0 bn 268435455; cn 266305 tn 0 sn 15), retrying
wd0: (id not found)
wd0c: error reading fsbn 268435455 (wd0 bn 268435455; cn 266305 tn 0 sn 15), retrying
wd0: (id not found)
wd0c: error reading fsbn 268435455 (wd0 bn 268435455; cn 266305 tn 0 sn 15), retrying
wd0: (id not found)
wd0: transfer error, downgrading to Ultra-DMA mode 2
wd0(satalink0:1:0): using PIO mode 4, Ultra-DMA mode 2 (Ultra/33) (using DMA data transfers)
wd0c: error reading fsbn 268435455 (wd0 bn 268435455; cn 266305 tn 0 sn 15), retrying
wd0: (id not found)
wd0c: error reading fsbn 268435455 (wd0 bn 268435455; cn 266305 tn 0 sn 15), retrying
wd0: (id not found)
wd0c: error reading fsbn 268435455 (wd0 bn 268435455; cn 266305 tn 0 sn 15)wd0: (id not found)