Slow performance on Hoary/Gutsy

[Torbjörn Österdahl]

I have a very slow performance on my system. The machine is somewhat
aged; it is a Nvida Nforce 2 with a AMD Athlon XP 2000+ CPU and 1GB RAM.
I have used Ubuntu since version 5.04, I do not know if I just need to
take this degradation into account? With Hoary I did a new install for
the first time since April 2005. Previously I always used the upgrade
option. After the install I noticed that the harddrive is identified
with as a serial ATA drive, although I am confident that this old drive
is does not have a serial ATA interface. Could this be the reason for
slow performance? DMA seem to be enabled from what I can see. 

I am grateful for all sorts of advice before I resort to buying some new
hardware. 

 sudo hdparm -i /dev/sda

/dev/sda:

 Model=ST3120024A                              , FwRev=3.33    ,
SerialNo=3KA1EJGH            
 Config={ HardSect NotMFM HdSw>15uSec Fixed DTR>10Mbs RotSpdTol>.5% }
 RawCHS=16383/16/63, TrkSize=0, SectSize=0, ECCbytes=4
 BuffType=unknown, BuffSize=8192kB, MaxMultSect=16, MultSect=?16?
 CurCHS=16383/16/63, CurSects=16514064, LBA=yes, LBAsects=234441648
 IORDY=on/off, tPIO={min:240,w/IORDY:120}, tDMA={min:120,rec:120}
 PIO modes:  pio0 pio1 pio2 pio3 pio4 
 DMA modes:  mdma0 mdma1 mdma2 
 UDMA modes: udma0 udma1 udma2 udma3 udma4 *udma5 
 AdvancedPM=no WriteCache=enabled
 Drive conforms to: ATA/ATAPI-6 T13 1410D revision 2:
ATA/ATAPI-1,2,3,4,5,6

 * signifies the current active mode


 dmesg|grep sda
[   33.856254] sd 0:0:0:0: [sda] 234441648 512-byte hardware sectors
(120034 MB)
[   33.856271] sd 0:0:0:0: [sda] Write Protect is off
[   33.856274] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[   33.856296] sd 0:0:0:0: [sda] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
[   33.856357] sd 0:0:0:0: [sda] 234441648 512-byte hardware sectors
(120034 MB)
[   33.856369] sd 0:0:0:0: [sda] Write Protect is off
[   33.856373] sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00
[   33.856391] sd 0:0:0:0: [sda] Write cache: enabled, read cache:
enabled, doesn't support DPO or FUA
[   33.856396]  sda:<4>Driver 'sr' needs updating - please use bus_type
methods
[   33.871214]  sda1 sda4 < sda5 sda6 >
[   33.891302] sd 0:0:0:0: [sda] Attached SCSI disk
[   51.277416] Adding 1951856k swap on /dev/sda5.  Priority:-1 extents:1
across:1951856k
[   51.836651] EXT3 FS on sda1, internal journal
[   52.590173] EXT3 FS on sda6, internal journal

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