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ba
l33t
Joined: 25 May 2003
Posts: 804
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 Posted: Mon Jun 21, 2004 9:40 am Post subject: hdd slowdown with 2.6 kernel |
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| Code: |
root@baz root # hdparm /dev/hdb
/dev/hdb:
multcount = 16 (on)
IO_support = 1 (32-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 19457/255/63, sectors = 312581808, start = 0
root@baz root # hdparm -I /dev/hdb
/dev/hdb:
ATA device, with non-removable media
Model Number: WDC WD1600JB-00EVA0
Serial Number: WD-WMAEK1039668
Firmware Revision: 15.05R15
Standards:
Supported: 6 5 4 3
Likely used: 6
Configuration:
Logical max current
cylinders 163833 65535
heads 16 1
sectors/track 63 63
--
CHS current addressable sectors: 4128705
LBA user addressable sectors: 268435455
LBA48 user addressable sectors: 312581808
device size with M = 1024*1024: 152627 MBytes
device size with M = 1000*1000: 160041 MBytes (160 GB)
Capabilities:
LBA, IORDY(can be disabled)
bytes avail on r/w long: 74 Queue depth: 1
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:
* 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
* FLUSH CACHE EXT command
* Mandatory FLUSH CACHE command
* Device Configuration Overlay feature set
* 48-bit Address feature set
Automatic Acoustic Management feature set
SET MAX security extension
* DOWNLOAD MICROCODE cmd
* SMART self-test
* SMART error logging
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
root@baz root # hdparm -tT /dev/hdb
/dev/hdb:
Timing buffer-cache reads: 484 MB in 2.01 seconds = 240.83 MB/sec
Timing buffered disk reads: 106 MB in 3.01 seconds = 35.26 MB/sec
root@baz root #
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But under 2.4 kernel hdparm gives about 55MB/sec with same settings(except readahead of course)... What's wrong here? |
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golloza
Guru
Joined: 14 Mar 2004
Posts: 427
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| Posted: Mon Jun 21, 2004 1:56 pm Post subject: |
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| Can you give the appropriate output from hdparm under 2.4 as well? |
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ba
l33t
Joined: 25 May 2003
Posts: 804
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| Posted: Mon Jun 21, 2004 2:28 pm Post subject: |
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| golloza wrote: | | Can you give the appropriate output from hdparm under 2.4 as well? |
It will be difficult, at least till next week... |
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Kernel & Hardware
