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Old 11-09-2006, 03:30 AM   #1
Thoddy
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Registered: Jul 2003
Location: Bremen, Germany
Distribution: Ubuntu 9.10
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Unhappy Hard drives on IDE raid controller very slow!?


I have 3 hard drives in my system, 1 directly on the mainborad (nForce2 chip) and 2 on an IDE raid controller. The one on the mainboard works fine and the other 2 work, but are damn slow! I am 99% sure this was not case in FC5, but after updating to FC6, this is somehow the case...

My two candidates are:
  • SAMSUNG HD300LD
  • Maxtor 6L300R0

Both are 300GB drives and rather new. They should support UDMA33 / UDMA 66 - also depending on the cables, I know.

It seems that UDMA is deactivated at boot time. Why is this?
Quote:
$ dmesg | grep DMA

DMA zone: 4096 pages, LIFO batch:0
NFORCE2: 0000:00:09.0 (rev a2) UDMA133 controller
ide0: BM-DMA at 0xf000-0xf007, BIOS settings: hdaMA, hdbMA
ide1: BM-DMA at 0xf008-0xf00f, BIOS settings: hdcMA, hddMA
ide2: BM-DMA at 0xa000-0xa007, BIOS settings: hdeMA, hdfio
ide3: BM-DMA at 0xa008-0xa00f, BIOS settings: hdgMA, hdhio
hda: 80418240 sectors (41174 MB) w/1821KiB Cache, CHS=16383/255/63, UDMA(100)
hde: 586072368 sectors (300069 MB) w/8192KiB Cache, CHS=36481/255/63, BUG DMA OFF
hdg: 586072368 sectors (300069 MB) w/16384KiB Cache, CHS=36481/255/63, BUG DMA OFF
hdc: ATAPI 40X DVD-ROM DVD-R-RAM CD-R/RW drive, 2048kB Cache, UDMA(33)


$ hdparm -v /dev/hde

/dev/hde:
multcount = 0 (off)
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 36481/255/63, sectors = 586072368, start = 0


$ hdparm -v /dev/hdg

/dev/hdg:
multcount = 0 (off)
IO_support = 0 (default 16-bit)
unmaskirq = 0 (off)
using_dma = 0 (off)
keepsettings = 0 (off)
readonly = 0 (off)
readahead = 256 (on)
geometry = 36481/255/63, sectors = 586072368, start = 0


$ hdparm -i /dev/hde

/dev/hde:

Model=SAMSUNG HD300LD, FwRev=WK100-12, SerialNo=S0A4J10L385695
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=34902, SectSize=554, ECCbytes=4
BuffType=DualPortCache, BuffSize=8192kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
IORDY=on/off
PIO modes: pio0 pio1 pio2
DMA modes: mdma0 mdma1 mdma2
AdvancedPM=no
Drive conforms to: unknown: ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7


$ hdparm -i /dev/hdg

/dev/hdg:

Model=Maxtor 6L300R0, FwRev=BAH41E00, SerialNo=L60NGV7H
Config={ Fixed }
RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=57
BuffType=DualPortCache, BuffSize=16384kB, MaxMultSect=16, MultSect=off
CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=268435455
IORDY=on/off
PIO modes: pio0 pio1 pio2
DMA modes: mdma0 mdma1 mdma2
AdvancedPM=no
Drive conforms to: ATA/ATAPI-7 T13 1532D revision 0: ATA/ATAPI-1 ATA/ATAPI-2 ATA/ATAPI-3 ATA/ATAPI-4 ATA/ATAPI-5 ATA/ATAPI-6 ATA/ATAPI-7
Any ideas??
 
Old 11-12-2006, 01:41 AM   #2
carl0ski
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Registered: Sep 2004
Location: Melbourne, Victoria Australia
Distribution: Support those that support you :)
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Quote:
Originally Posted by Thoddy
I have 3 hard drives in my system, 1 directly on the mainborad (nForce2 chip) and 2 on an IDE raid controller. The one on the mainboard works fine and the other 2 work, but are damn slow! I am 99% sure this was not case in FC5, but after updating to FC6, this is somehow the case...

My two candidates are:
  • SAMSUNG HD300LD
  • Maxtor 6L300R0

Both are 300GB drives and rather new. They should support UDMA33 / UDMA 66 - also depending on the cables, I know.

It seems that UDMA is deactivated at boot time. Why is this?


Any ideas??
New EIDE drives support ATA100 or Rarely ATA133

find out your drive names/locations

$mount
Code:
/dev/sda1 on /boot type ext3 (rw,acl,user_xattr)
/dev/sda5 on /home type ext3 (rw)
/dev/md0 on /media/Recordings type ext3 (rw)
/dev/sdb1 on /media/Windows type ntfs (ro,noexec,nosuid,nodev,gid=100,umask=0002,nls=utf8)
oh and i have same generation MAXTOR 6L200M0 here
$hdparm -tT /dev/sdb
Code:
/dev/sdb:
 Timing cached reads:   2268 MB in  2.00 seconds = 1132.88 MB/sec
 Timing buffered disk reads:  186 MB in  3.03 seconds =  61.43 MB/sec
$hdparm -tT /dev/md0

Code:
/dev/md0:
 Timing cached reads:   2288 MB in  2.00 seconds = 1144.20 MB/sec
 Timing buffered disk reads:  284 MB in  3.00 seconds =  94.59 MB/sec
i don't have an IDE hdd anymore but "Timing buffered disk reads" should be not much more than 10-20% less than mine
 
  


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