Re: [Hampshire] [OT] Hardware degradation

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Author: Alan Pope
Date:  
To: Hampshire LUG Discussion List
Subject: Re: [Hampshire] [OT] Hardware degradation

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On Fri, 2007-01-19 at 11:15 +0000, Rob Malpass wrote:
> Sorry - should have made myself clearer. Say I was running XP ( first
> installed around Christmas 2004), if I were to swap HDDs for a brand new one
> and install XP from the same CD I installed in Christmas 2004 (to the brand
> new HDD) - will it be as fast as it was(assuming I install the same
> applications I installed at Christmas 2004)?


It would initially be faster assuming the disk quoted performance is
faster, spin rate is higher, has a larger cache and so on.

You can compare them by booting a Linux (say from a Live CD) and running
hdparm to check the performance:-

alan@wopr:~$ sudo hdparm -t -T /dev/sda

/dev/sda:
Timing cached reads: 7586 MB in 2.00 seconds = 3796.47 MB/sec
Timing buffered disk reads: 208 MB in 3.00 seconds = 69.25 MB/sec
alan@wopr:~$ sudo hdparm -t -T /dev/sdb

/dev/sdb:
Timing cached reads: 7280 MB in 2.00 seconds = 3643.11 MB/sec
Timing buffered disk reads: 196 MB in 3.00 seconds = 65.24 MB/sec
alan@wopr:~$ sudo hdparm -t -T /dev/sdg

/dev/sdg:
Timing cached reads: 7074 MB in 2.00 seconds = 3539.56 MB/sec
Timing buffered disk reads: 70 MB in 3.08 seconds = 22.76 MB/sec

In the above example sda and sdb are identical internal SATA disks, sdg
is an external USB connected disk, hence the disk reads being slower.

Cheers,
Al.