Hi:
My Toshiba laptop with a 10 GB fujitsu mhm2100at reads
64MB in 3.84 sec = 16.67 MB/sec

hp laptop

Disk /dev/hda: 60.0 GB, 60011642880 bytes
255 heads, 63 sectors/track, 7296 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

default redhat 9 install

/dev/hda:
multcount = 16 (on)
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 8 (on)
geometry = 7296/255/63, sectors = 117210240, start = 0


/dev/hda:
Timing buffer-cache reads: 128 MB in 0.40 seconds =320.00 MB/sec
Timing buffered disk reads: 64 MB in 2.25 seconds = 28.44 MB/sec

/dev/hda
timing buffered disk reads 64 MB in 2.74 seconds = 23.36 MB / sec.

/dev/hdb
timing buffered disk reads 64 MB in 2.42 seconds = 26.45 MB / sec.

/dev/hda:
Timing buffered disk reads: 64 MB in 1.35 seconds = 47.41 MB/sec
[root@localhost root]# hdparm -t /dev/hdb

/dev/hdb:
Timing buffered disk reads: 64 MB in 3.73 seconds = 17.16 MB/sec
[root@localhost root]# hdparm -t /dev/hdb5

/dev/hdb5:
Timing buffered disk reads: 64 MB in 1.42 seconds = 45.07 MB/sec


Maxtor DiamondMax Plus 9 60GB (both drives)
ATA/133 2MB buffer
7200 RPM
Logical CHS 16,383/16/63
Avg seek <9.3ms
Avg latency 4.2ms

hda is RedHat 9
hdb is Windoze XP
hdb5 is data partition on XP

Built the box here last Oct. Bought the 2nd hd in the States in May. Was intending to setup RAID0, but installed RedHat 9 on the second drive instead.

Will either change RH to, or add, Debian in a few hours :-)

/dev/hdb
Timing buffer-cache reads: 128 MB in 0.28 seconds =465.45 MB/sec
Timing buffered disk reads: 64 MB in 1.40 seconds =45.88 MB/sec

Measly Maxtor fireball aka. 2F040L0 5400 rpm with 40 GB - interesting;bout the same speed.

/dev/hda:
Timing buffered disk reads: 64 MB in 2.18 seconds = 29.36 MB/sec
/dev/hdb:
Timing buffered disk reads: 64 MB in 15.01 seconds = 4.26 MB/sec
/dev/hdc:
Timing buffered disk reads: 64 MB in 2.08 seconds = 30.74 MB/sec

hda = 60gig Western Digital WD600BB-32CCB0
hdb = 20gig Maxtor 2F020J0
hdc = 80gig Western Digital WD800BB-00CAA0

i dont' know why the 20gig is soo damn slow, its the newest and fastest drive of the three...think there is somethign fishy going on there

This contest is simply a way to make some people realize that they are not using the full potential of their Hard Drive!
I'll show you...

Logged in as root do this:
[root@localhost]$/sbin/hdparm -tT /dev/(drive)
Replace (drive) with the nam of your physical drive(probably hda or hdb)

You'll proably get something similar to this:

/dev/(drive):
Timing buffer-cache reads: 128 MB in 1.34 seconds =95.52 MB/sec
Timing buffered disk reads: 64 MB in 17.86 seconds = 3.58 MB/sec


This is a BAD result...

Read this:
[url]http://tldp.org/LDP/solrhe/Securing-Optimizing-Linux-The-Ultimate-Solution-v2.0.pdf[/url
The section wich interests us for now is: Chapter 5, General System Optimization and Chapter 6.

Watch out, the books is not new; apply it's directive carefully...
Note: In the 'IDE performace tuning' section, it says +=RH7.1 optimizes the HD automatically... it doesn't really do it(from what I see)!

Then redo an hdparm -tT, AND...
/dev/hdb:
Timing buffer-cache reads: 128 MB in 0.42 seconds =304.76 MB/sec
Timing buffered disk reads: 64 MB in 1.58 seconds = 40.51 MB/sec


This is my story(for real)...

So, what your result?

Lokee,

I merged your last thread with an already existing thread in which we have many contributing to. No need for a separate thread. This makes it easier for others when searching or browsing to find relevant information in all one place, instead spread across the forums.

Regards.

hi folks,

here's mine:

IBM-DJNA-352500
[root@gondor: root]# hdparm -tT /dev/hda

/dev/hda:
Timing buffer-cache reads: 128 MB in 0.44 seconds =290.91 MB/sec
Timing buffered disk reads: 64 MB in 4.30 seconds = 14.88 MB/sec


IBM-IC35L060AVVA07-0
[root@gondor: root]# hdparm -tT /dev/hdc

/dev/hdc:
Timing buffer-cache reads: 128 MB in 0.44 seconds =290.91 MB/sec
Timing buffered disk reads: 64 MB in 1.40 seconds = 45.71 MB/sec

64 mb in 3.08 second = 20.78 MB/sec
40 gig laptop dirve, i think 4200 rpm

Maxtor fireball 20gb 5400

hdparm -tT /dev/hda

Timing buffer-cache reads: 128 mb in 0.97 seconds =131.96 MB/sec

Timing buffered disk reads: 64 mb in 1.77 seconds = 36.16 MB/s

Western digital Caviar 7,200 rpm 80 GB

Timing buffer-cache reads: 128 MB in 0.33 seconds =387.88 MB/sec
Timing buffered disk reads: 64 MB in 2.36 seconds = 27.12 MB/sec

achieved using the following:

multcount = 16 (on)
IO_support = 3 (32-bit w/sync)
unmaskirq = 0 (off)
using_dma = 1 (on)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 8 (on)

/dev/hda:
Timing buffer-cache reads: 128 MB in 0.22 seconds =581.82 MB/sec
Timing buffered disk reads: 64 MB in 1.37 seconds = 46.72 MB/sec

/dev/hdb:
Timing buffer-cache reads: 128 MB in 0.22 seconds =581.82 MB/sec
Timing buffered disk reads: 64 MB in 1.11 seconds = 57.66 MB/sec

lokee,

Thanks for the link. Now for the improvements vs. post # 289

debian:/usr/src/linux# hdparm -Tt /dev/hda

/dev/hda:
Timing buffer-cache reads: 128 MB in 0.28 seconds =457.14 MB/sec
Timing buffered disk reads: 64 MB in 1.34 seconds = 47.76 MB/sec


And the -I option vs. -i option is a big help, too.

debian:/usr/src/linux# hdparm -I /dev/hda

/dev/hda:

non-removable ATA device, with non-removable media
Model Number: Maxtor 6Y060L0
Serial Number: Y2VRB7SE
Firmware Revision: YAR41VW0
Standards:
Supported: 1 2 3 4 5 6 7
Likely used: 7
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 = 120103200
Capabilities:
LBA, IORDY(can be disabled)
Buffer size: 2048.0kB ECC bytes: 57 Queue depth: 1
Standby timer values: spec'd by standard, no device specific minimum
r/w multiple sector transfer: Max = 16 Current = 0
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:
* NOP cmd
* 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
Advanced Power Management feature set
* 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 = 0 determined by the jumper
Checksum: correct

Western Digital 20GB (IDE)
[root@localhost root]# hdparm -Tt /dev/hdb

/dev/hdb:
Timing buffer-cache reads: 128 MB in 0.21 seconds =609.52 MB/sec
Timing buffered disk reads: 64 MB in 2.24 seconds = 28.57 MB/sec
[root@localhost root]# hdparm -I /dev/hdb

/dev/hdb:

ATA device, with non-removable media
Model Number: WDC WD200BB-00DEA0
Serial Number: Edited my post to take this off lol
Firmware Revision: 05.03ER2
Standards:
Supported: 5 4 3 2
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: 39102336
device size with M = 1024*1024: 19092 MBytes
device size with M = 1000*1000: 20020 MBytes (20 GB)
Capabilities:
LBA, IORDY(can be disabled)
bytes avail on r/w long: 40 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
* Device Configuration Overlay 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 CSEL
Checksum: correct