Does Partitioning C Drive slow speed?

  • Thread starter Thread starter Sam Lewis
  • Start date Start date
S

Sam Lewis

Hi All
a computer vendor told me that partitioning C Drive (in my case to keep data
separate from OS) would significantly slow down the speed of the computer.I
this true and why,thanks
Sam
 
Please read the following:

Benchmarking on Windows XP
http://www.microsoft.com/whdc/system/sysperf/benchmark.mspx

NTFS Preinstallation and Windows XP
http://www.microsoft.com/whdc/system/winpreinst/ntfs-preinstall.mspx

<snip>

Microsoft implemented certain disk-layout optimizations in Windows XP.
To perform this optimization, during idle time Windows XP moves pages
used for booting the system and launching frequently used applications to
ensure these files are laid out contiguously on the hard disk. The contiguous
disk layout of these pages results in reduced disk seeks and improved disk I/O,
contributing to improved boot time and application launch time.

Windows XP does not perform these optimizations across volumes. Therefore,
for this optimization to be available to users, the hard disk must be partitioned
as a single volume.

<end of snip>

--
Carey Frisch
Microsoft MVP
Windows - Shell/User
Microsoft Community Newsgroups
news://msnews.microsoft.com/

-------------------------------------------------------------------------------------------

:

| Hi All
| a computer vendor told me that partitioning C Drive (in my case to keep data
| separate from OS) would significantly slow down the speed of the computer.I
| this true and why,thanks
| Sam
 
So does this mean that only bootup time and some applications will be slower
(and is it noticeable or not.. as per Rich's post) to *launch* (Word is darn
slow anyway) but otherwise *run at same speed*? Would it affect such things
as photo or videoediting (apart from slowing app launch)?
Many thanks
Sam
 
On Tue, 10 Jan 2006 07:43:34 +1100, "Sam Lewis"
a computer vendor told me that partitioning C Drive (in my case to keep data
separate from OS) would significantly slow down the speed of the computer.I
this true and why,thanks

As stated, it's meaningless - C: "drive" *is* a (primary) partition,
and you can't create logical volumes in a primary partition. So if
you are verbatim-quoting the tech, I'd be inclined to flush now :-)

Every standard hard drive can contain up to 4 partitions. A HD set up
as a single primary partition "C:" has one partition present - so it
is already "partitioned".

Whether creating multiple partitions and volumeson the same HD will
speed upor slow it down, depends on:
- where the partitions are on the physical HD
- how big they are
- what the file system and clusrter size are
- what you put in each volume

Of these, the last is the biggie.

You can slow down a system by creating multiple partitions and
volumes. For example, create a small primary as C:, then an extended
with a large volume D: and a small volume E: at the end. Install the
OS on C:, i.e. at the "start" of the HD, then locate Temp, TIF and
pagefile in E:, as far away from C: as possible. You will have
constant head travel from the OS on C: to the swap etc. on E:, making
the system as slow as if one big C: had filled up, if not worse.

You can speed up a system in the same way, by making better choices.
Let's say you have a 120G HD and you want to store 80G of music that
you need to keep handy, but play only now and then when not really
using the PC otherwise. Here's what you do: small C: for OS,
pagefile, temp and TIF, the rest as an extended with small D:for data,
then a laaarge E: for that music collection, then a small F: for
backups. Now no matter how big the music, most head travel is kept to
the "front" of the HD, no matter how fragged the volumes get.

But speed isn't everything; there's also safety to consider. Data
gets corrupted during file writes, and the OS is constantly bashing
away at Temp, TIF and pagefile on C: - which is an excellent reason to
keep your data off C:, as in the previous example. Not being able to
work at all, because your data is gone, is really "slow".

Finally, there's ease of maintenance.

The XP OS is fragile; it won't survive being copies as loose files
from one HD to another - the whole volume has to be backed up as a
partition image. That's an awful palaver when you have one huge
doomed 120G C:, but it's a lot easier when C: is only 8G - you can
store multiple backup images off it in logical volume E:, in last e.g.

After a bad exit, C: usually has to be "fixed". That's a lot quicker
when C: is 8G rather than 120G, and data off C: is protected against
the "fixes" on C: Defrag is faster too, and less necessary because no
matter how fragged C: gets, it still spans no more than 8G.

Your vendor's wrong, unless he goes out of his way to plan partitions
and contents as badly as possible.


---------- ----- ---- --- -- - - - -
Don't pay malware vendors - boycott Sony
 
Sam Lewis said:
Hi All
a computer vendor told me that partitioning C Drive (in my case to keep
data separate from OS) would significantly slow down the speed of the
computer.I this true and why,thanks
Sam

He's wrong.

I use removable drives...
and have several XP installations using all kinds of partitioning schemes
and there is no noticeable difference
 
Thanks for very helpful and considered answer
Sam
cquirke (MVP Windows shell/user) said:
On Tue, 10 Jan 2006 07:43:34 +1100, "Sam Lewis"


As stated, it's meaningless - C: "drive" *is* a (primary) partition,
and you can't create logical volumes in a primary partition. So if
you are verbatim-quoting the tech, I'd be inclined to flush now :-)

Every standard hard drive can contain up to 4 partitions. A HD set up
as a single primary partition "C:" has one partition present - so it
is already "partitioned".

Whether creating multiple partitions and volumeson the same HD will
speed upor slow it down, depends on:
- where the partitions are on the physical HD
- how big they are
- what the file system and clusrter size are
- what you put in each volume

Of these, the last is the biggie.

You can slow down a system by creating multiple partitions and
volumes. For example, create a small primary as C:, then an extended
with a large volume D: and a small volume E: at the end. Install the
OS on C:, i.e. at the "start" of the HD, then locate Temp, TIF and
pagefile in E:, as far away from C: as possible. You will have
constant head travel from the OS on C: to the swap etc. on E:, making
the system as slow as if one big C: had filled up, if not worse.

You can speed up a system in the same way, by making better choices.
Let's say you have a 120G HD and you want to store 80G of music that
you need to keep handy, but play only now and then when not really
using the PC otherwise. Here's what you do: small C: for OS,
pagefile, temp and TIF, the rest as an extended with small D:for data,
then a laaarge E: for that music collection, then a small F: for
backups. Now no matter how big the music, most head travel is kept to
the "front" of the HD, no matter how fragged the volumes get.

But speed isn't everything; there's also safety to consider. Data
gets corrupted during file writes, and the OS is constantly bashing
away at Temp, TIF and pagefile on C: - which is an excellent reason to
keep your data off C:, as in the previous example. Not being able to
work at all, because your data is gone, is really "slow".

Finally, there's ease of maintenance.

The XP OS is fragile; it won't survive being copies as loose files
from one HD to another - the whole volume has to be backed up as a
partition image. That's an awful palaver when you have one huge
doomed 120G C:, but it's a lot easier when C: is only 8G - you can
store multiple backup images off it in logical volume E:, in last e.g.

After a bad exit, C: usually has to be "fixed". That's a lot quicker
when C: is 8G rather than 120G, and data off C: is protected against
the "fixes" on C: Defrag is faster too, and less necessary because no
matter how fragged C: gets, it still spans no more than 8G.

Your vendor's wrong, unless he goes out of his way to plan partitions
and contents as badly as possible.



Don't pay malware vendors - boycott Sony
 
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