Hi folks,
I am in the process of moving my OS from drive to drive and thought I
would test to see which drive is the fastest. I got some strange
results when I tested them One drive is MUCH slower than the others on
the buffered disk reads but I can't see any reason why that would be
so. This is the test results:
smoker-new ~ # hdparm -Tt /dev/hda
/dev/hda:
Timing cached reads: 816 MB in 2.00 seconds = 407.41 MB/sec
Timing buffered disk reads: 172 MB in 3.03 seconds = 56.70 MB/sec
smoker-new ~ # hdparm -Tt /dev/hdb
/dev/hdb:
Timing cached reads: 818 MB in 2.00 seconds = 408.77 MB/sec
Timing buffered disk reads: 38 MB in 3.03 seconds = 12.55 MB/sec
smoker-new ~ # hdparm -Tt /dev/hdc
/dev/hdc:
Timing cached reads: 820 MB in 2.00 seconds = 409.93 MB/sec
Timing buffered disk reads: 170 MB in 3.03 seconds = 56.12 MB/sec
smoker-new ~ #
As you may be able to tell, hdb is really really slow. Well, they are
all pretty slow but that one is a lot slower for some reason. This is
the info from hdparm on each drive: Sorry so long but it may help.
smoker-new ~ # hdparm -I /dev/hda
/dev/hda:
ATA device, with non-removable media
Model Number: Maxtor 6E040L0
Serial Number: E15KS65E
Firmware Revision: NAR61590
Standards:
Used: ATA/ATAPI-7 T13 1532D revision 0
Supported: 7 6 5 4
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 78156288
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 38162 MBytes
device size with M = 1000*1000: 40016 MBytes (40 GB)
cache/buffer size = 2048 KBytes (type=DualPortCache)
Capabilities:
LBA, IORDY(can be disabled)
Standby timer values: spec'd by Standard, no device specific
minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: disabled
Recommended acoustic management value: 192, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
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:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_VERIFY command
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
Advanced Power Management feature set
SET_MAX security extension
* Automatic Acoustic Management feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Checksum: correct
smoker-new ~ # hdparm -I /dev/hdb
/dev/hdb:
ATA device, with non-removable media
Model Number: WDC WD800BB-00DKA0
Serial Number: WD-WCAHL2497094
Firmware Revision: 77.07W77
Standards:
Supported: 6 5 4
Likely used: 6
Configuration:
Logical max current
cylinders 16383 16383
heads 16 16
sectors/track 63 63
--
CHS current addressable sectors: 16514064
LBA user addressable sectors: 156301488
LBA48 user addressable sectors: 156301488
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 76319 MBytes
device size with M = 1000*1000: 80026 MBytes (80 GB)
cache/buffer size = 2048 KBytes (type=DualPortCache)
Capabilities:
LBA, IORDY(can be disabled)
Standby timer values: spec'd by Standard, with device specific
minimum
R/W multiple sector transfer: Max = 16 Current = 16
Recommended acoustic management value: 128, current value: 254
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:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_BUFFER command
* READ_BUFFER command
* DOWNLOAD_MICROCODE
SET_MAX security extension
* Automatic Acoustic Management feature set
* 48-bit Address feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
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
smoker-new ~ # hdparm -I /dev/hdc
/dev/hdc:
ATA device, with non-removable media
Model Number: Maxtor 6Y080P0
Serial Number: Y22J9KXE
Firmware Revision: YAR41BW0
Standards:
Used: ATA/ATAPI-7 T13 1532D revision 0
Supported: 7 6 5 4
Configuration:
Logical max current
cylinders 16383 4047
heads 16 16
sectors/track 63 255
--
CHS current addressable sectors: 16511760
LBA user addressable sectors: 160086528
Logical/Physical Sector size: 512 bytes
device size with M = 1024*1024: 78167 MBytes
device size with M = 1000*1000: 81964 MBytes (81 GB)
cache/buffer size = 7936 KBytes (type=DualPortCache)
Capabilities:
LBA, IORDY(can be disabled)
Standby timer values: spec'd by Standard, no device specific
minimum
R/W multiple sector transfer: Max = 16 Current = 16
Advanced power management level: disabled
Recommended acoustic management value: 192, current value: 254
DMA: mdma0 mdma1 mdma2 udma0 udma1 udma2 udma3 udma4 udma5 *udma6
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:
* SMART feature set
Security Mode feature set
* Power Management feature set
* Write cache
* Look-ahead
* Host Protected Area feature set
* WRITE_VERIFY command
* WRITE_BUFFER command
* READ_BUFFER command
* NOP cmd
* DOWNLOAD_MICROCODE
Advanced Power Management feature set
SET_MAX security extension
* Automatic Acoustic Management feature set
* Device Configuration Overlay feature set
* Mandatory FLUSH_CACHE
* FLUSH_CACHE_EXT
* SMART error logging
* SMART self-test
Security:
Master password revision code = 65534
supported
not enabled
not locked
not frozen
not expired: security count
not supported: enhanced erase
HW reset results:
CBLID- above Vih
Device num = 0 determined by the jumper
Checksum: correct
smoker-new ~ #
For the record, hda and hdb are not even mounted. I am currently using
hdc for the OS. The drive used to be a lot faster than this. I used it
for my OS a good while back and recently used it for /var/portage and
/usr/portage. I'm not sure what has changed so I can't figure out why
it is so slow. Anyone see something I am missing? All I see is the
others are udma6 while it is udma5. It has always been that way tho.
Thoughts?
Dale
:-) :-)
