[Thinkpad] ThinkPad X31's IC25N ATA100 drive not up to spec!

Hey guys, I was browsing a web site the other day that claimed that for
UDMA-5 mode (aka ATA100) to work with an Intel chipset, one needs to do a
registry modification first. Sounded kind of crazy. But it got me
wondering about our X31s. So I fired up SiSoft Sandra 2003 and tested the
IC25N 4200 RPM ATA100 Hitachi drive. Sandra thinks it is ATA100 now. But
Sandra gave it a score of only 8407 kB/s! For comparison, according to
Sandra:

ATA100 5400 RPM: 20000 kB/s
ATA66 4200 RPM: 10300 kB/s
ATA100 4200 RPM X31: 8407 kB/s
ATA33 4200 RPM: 6500 kB/s

Looks like this drive is going about twice as slow as it should be. Anyone
else using this drive agree there is something wrong? If so, how do I make
the registry hack to get ATA100?

More data:

RAM: 512 MBPC2700 cas2.5 + 256 PC2100 cas2 SiSoftware Sandra

OS: Windows XP SP1 factory default
General Capabilities of drive according to Ssandra 2003:
Channel : Master
Type : ATA
Removable Device : No
Model : IC25N020ATCS04-0
Revision : CA2OA71A
Serial Number : XXX
ATA/ATAPI Approved Version : 5.19
Cache Buffer Type : Multi-Sector with Read Cache Cache Buffer Size : 1768kB
(3536 sectors)

Drive Geometry
CHS Geometry : 16383 x 15 x 63
CHS Total Sectors : 15481935
LBA Total Sectors : 39070080
Number of ECC Bytes : 4
Disk Capacity : 18.6GB

Translation Mode Geometry
CHS Geometry : 16383 x 15 x 63
CHS Total Sectors : 15481935

Properties
IORDY Support : Yes
IORDY Disableable : Yes
LBA Support : Yes
DMA Support : Yes

Features
SMART Support : Yes
Security Support : Yes
Power Management Support : Yes
Advanced Power Management Support : Yes
Power-up in Standby : Yes
Packet Command Interface : No
Removable Media : No
Look-Ahead Buffer : Yes
Write-Back Cache : Yes
Host Protect Area : Yes
Microcode Update : No
Acoustic Management : No
48-bit LBA : No
Device Config Overlay : Yes

Active Features
SMART Enabled : Yes
Security Enabled : No
Power Management Enabled : Yes
Advanced Power Management Enabled : Yes
Power-up in Standby Enabled : No
Look-Ahead Buffer Enabled : Yes
Write-Back Cache Enabled : Yes
Host Protect Area Enabled : Yes

SMART Information
Version : 1.01
ATA Commands Support : Yes
ATAPI Commands Support : Yes
SMART Commands Support : Yes

SMART Data
Raw Read Error Rate (01) : 0 (Th 62; Min 100; Max 100) Throughput
Performance (02) : 0 (Th 40; Min 100; Max 100) Spin-up Time (03) : 1 (Th 33;
Min 127; Max 127) Start/Stop Count (04) : 1542 (Th 0; Min 100; Max 100)
Re-Allocated Sector Count (05) : 0 (Th 5; Min 100; Max 100) Seek Error Rate
(07) : 0 (Th 67; Min 100; Max 100) Seek Time Performance (08) : 0 (Th 40;
Min 100; Max 100) Power-On Time Count (09) : 1455 (Th 0; Min 97; Max 97)
Spin Retry Count (0A) : 0 (Th 60; Min 100; Max 100) Power Cycle Count (0C) :
1012 (Th 0; Min 100; Max 100) G-Sense Error Count (BF) : 0 (Th 0; Min 100;
Max 100) Power-Off Park Count (C0) : 12 (Th 0; Min 100; Max 100) Load/Unload
Cycle Count (C1) : 37965 (Th 0; Min 97; Max 97) Drive Temperature (C2) : 51
(Th 0; Min 107; Max 107) Re-Allocated Data Count (C4) : 0 (Th 0; Min 100;
Max 100) Pending Sector Count (C5) : 0 (Th 0; Min 100; Max 100)
Un-Correctable Sector Count (C6) : 0 (Th 0; Min 100; Max 100) CRC Error
Count (C7) : 0 (Th 0; Min 200; Max 200)

Environment Monitor(s)
HD / Aux Temperature : 51.0°C / 123.8°F

Transfer Modes Support
Maximum Block Transfer : 16
Transfer Width : 16-bit
Max PIO Mode : PIO-4
Max DMA MW Mode : MWDMA-2
Max UDMA Mode : UDMA-5

Transfer Modes Active
Current Block Transfer : 16
Current Active Mode : UDMA-5

Performance Tips
Warning 3101 : Power management enabled. Consider disabling on desktops.
Tip 2 : Double-click tip or press Enter while a tip is selected for more
information about the tip.

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Received on Mon Jun 14 20:23:00 2004