Re: IDE Harddrive Performance

Sebastian Dröge
2001-12-20T17:39:25Z

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Hi,
My disc throughput on a Intel PIIX4 with an IBM-DTTA-351010 (10 GB/hda) and a Western Digital WD800BB-00BSA0 (80 GB/hdb)
Kernel is 2.5.1-dj2
Maybe it helps a bit ;)
Little question for the masters of hardware here in the list... buffer-chache reads speed is just the speed of the cache, right?
So I think only buffered disk reads say something about the real speed of the drive. And 10 or 11 MB/sec aren't much...

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root:/home/slomo# hdparm -Tt /dev/hda

/dev/hda:
Timing buffer-cache reads: 128 MB in 1.49 seconds = 85.91 MB/sec
Timing buffered disk reads: 64 MB in 5.93 seconds = 10.79 MB/sec

root:/home/slomo# hdparm /dev/hda

/dev/hda:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 1232/255/63, sectors = 19807200, start = 0

root:/home/slomo# hdparm -I /dev/hda

/dev/hda:

non-removable ATA device, with non-removable media
Model Number: IBM-DTTA-351010
Serial Number: WF0WFHH5554
Firmware Revision: T56OA73A
Standards:
Used: ATA/ATAPI-4 T13 1153D revision 17
Supported: 1 2 3 4
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
bytes/track: 0 (obsolete)
bytes/sector: 0 (obsolete)
current sector capacity: 16514064
LBA user addressable sectors = 19807200
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 466.0kB ECC bytes: 34 Queue depth: 32
Standby timer values: spec'd by standard, no device specific minimum
r/w multiple sector transfer: Max = 16 Current = 16
DMA: sdma0 sdma1 sdma2 mdma0 mdma1 mdma2 udma0 udma1 *udma2
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=240ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* NOP cmd
* READ BUFFER cmd
* WRITE BUFFER cmd
* Host Protected Area feature set
release interrupt
* look-ahead
* write cache
* Power Management feature set
Security Mode feature set
* SMART feature set
* READ/WRITE DMA QUEUED
Security:
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
22min for SECURITY ERASE UNIT.

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root:/home/slomo# hdparm -Tt /dev/hdb

/dev/hdb:
Timing buffer-cache reads: 128 MB in 1.39 seconds = 92.09 MB/sec
Timing buffered disk reads: 64 MB in 5.61 seconds = 11.41 MB/sec

root:/home/slomo# hdparm /dev/hdb

/dev/hdb:
multcount = 16 (on)
I/O support = 1 (32-bit)
unmaskirq = 1 (on)
using_dma = 1 (on)
keepsettings = 0 (off)
nowerr = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 155061/16/63, sectors = 156301488, start = 0

root:/home/slomo# hdparm -I /dev/hdb

/dev/hdb:

non-removable ATA device, with non-removable media
Model Number: WDC WD800BB-00BSA0
Serial Number: WD-WMA6S1226085
Firmware Revision: 12.08C12
Standards:
Supported: 1 2 3 4 5
Likely used: 5
Configuration:
Logical max current
cylinders 16383 17475
heads 16 15
sectors/track 63 63
bytes/track: 57600 (obsolete)
bytes/sector: 600 (obsolete)
current sector capacity: 16513875
LBA user addressable sectors = 156301488
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 2048.0kB ECC bytes: 40 Queue depth: 1
Standby timer values: spec'd by standard, with device specific minimum
r/w multiple sector transfer: Max = 16 Current = 16
DMA: mdma0 mdma1 mdma2 udma0 udma1 *udma2 udma3 udma4 udma5
Cycle time: min=120ns recommended=120ns
PIO: pio0 pio1 pio2 pio3 pio4
Cycle time: no flow control=120ns IORDY flow control=120ns
Commands/features:
Enabled Supported:
* READ BUFFER cmd
* WRITE BUFFER cmd
* Host Protected Area feature set
* look-ahead
* write cache
* Power Management feature set
Security Mode feature set
* SMART feature set
SET MAX security extension
* DOWNLOAD MICROCODE cmd
Security:
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 1 determined by the jumper
Checksum: correct

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