[Igor_I]

В качестве продолжения взят другой винчестер

=== START OF INFORMATION SECTION ===
Model Family: Western Digital Caviar SE family
Device Model: WDC WD2500JB-00GVC0
Serial Number: WD-WCAL76603272
Firmware Version: 08.02D08
User Capacity: 250 059 350 016 bytes
ATA Version is: 6
ATA Standard is: Exact ATA specification draft version not indicated


******* Working on device /dev/ad4 *******
parameters extracted from in-core disklabel are:
cylinders=7752336 heads=1 sectors/track=63 (63 blks/cyl)

Figures below won't work with BIOS for partitions not in cyl 1
parameters to be used for BIOS calculations are:
cylinders=7752336 heads=1 sectors/track=63 (63 blks/cyl)

Media sector size is 512
Warning: BIOS sector numbering starts with sector 1
Information from DOS bootblock is:

The data for partition 1 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 63, size 20972385 (10240 Meg), flag 80 (active)
beg: cyl 1/ head 0/ sector 1;
end: cyl 95/ head 0/ sector 63

The data for partition 2 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 20972448, size 446274864 (217907 Meg), flag 0
beg: cyl 96/ head 0/ sector 1;
end: cyl 815/ head 0/ sector 63

The data for partition 3 is:
sysid 165 (0xa5),(FreeBSD/NetBSD/386BSD)
start 467247312, size 21149856 (10327 Meg), flag 0
beg: cyl 816/ head 0/ sector 1;
end: cyl 655/ head 0/ sector 63


то есть разбит на 10(ad4s1a)+217(ad4s2a)+10(ad4s3a)

1) скорость на запись
time dd if=/dev/zero of=/mnt/ad41/test/file bs=16384 count=65000
1064960000 bytes transferred in 18.790220 secs (56676292 bytes/sec)
0.031u 4.332s 0:18.81 23.1% 25+228k 23+8160io 0pf+0w

time dd if=/dev/zero of=/mnt/ad42/test/file bs=16384 count=65000
1064960000 bytes transferred in 19.721640 secs (53999566 bytes/sec)
0.039u 4.649s 0:19.74 23.6% 25+226k 35+8160io 0pf+0w

time dd if=/dev/zero of=/mnt/ad43/test/file bs=16384 count=65000
1064960000 bytes transferred in 31.197468 secs (34136104 bytes/sec)
0.066u 4.589s 0:31.25 14.8% 27+245k 36+8165io 0pf+0w

тут еще за бортом остаются такие параметры как "килобайт на транзакцию" и "количество транзакций в секунду".
Тоже весьма любопытный параметр