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SubjectRe: Poor performance during disk writes
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On Mon, 2001-12-17 at 20:09, Reid Hekman wrote:

> Specific kernel version, df, & hdparm output would all be helpful.
/usr 24> uname -a
Linux PC2 2.4.16 #1 Sun Dec 2 15:26:09 EST 2001 i586 unknown
/usr 25> df .
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/hdb1 6047724 3472788 2267728 61% /usr
/usr 26> hdparm -I /dev/hdb

/dev/hdb:

non-removable ATA device, with non-removable media
Model Number: ST320413A
Serial Number: 6ED2305M
Firmware Revision: 3.39
Standards:
Supported: 1 2 3 4 5
Likely used: 5
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 = 39102336
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 512.0kB Queue depth: 1
Standby timer values: spec'd by standard
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=240ns 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:
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 = 1
Checksum: correct

My hdb hard drive is where I found the problem originally. Also, I'm
running the ext2 filesystem.

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"Life would be so much easier if we could just look at the source code."
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