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#1 2005-12-27 20:28:23

Komodo
Member
From: Oxford, UK
Registered: 2005-11-03
Posts: 674

Delay whilst mounting HDDs on bootup

While mounting 2 hard drives and 1 partiton at bootup, I get about a 15 second delay. Any ideas why, or what I can do to background this, or speed it up?

Thanks


.oO Komodo Dave Oo.

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#2 2005-12-27 21:03:50

AndyRTR
Developer
From: Magdeburg/Germany
Registered: 2005-10-07
Posts: 1,640

Re: Delay whilst mounting HDDs on bootup

Check your mouting options in /etc/fstab.

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#3 2005-12-27 21:09:28

Komodo
Member
From: Oxford, UK
Registered: 2005-11-03
Posts: 674

Re: Delay whilst mounting HDDs on bootup

Well, I'll fiddle around with them, but everything mounts super-fast when I do it manually.


.oO Komodo Dave Oo.

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#4 2005-12-27 21:19:27

AndyRTR
Developer
From: Magdeburg/Germany
Registered: 2005-10-07
Posts: 1,640

Re: Delay whilst mounting HDDs on bootup

You´re using reiserfs on your partitions?

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#5 2005-12-27 21:25:57

Komodo
Member
From: Oxford, UK
Registered: 2005-11-03
Posts: 674

Re: Delay whilst mounting HDDs on bootup

Reiserfs on all of them, yes.


.oO Komodo Dave Oo.

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#6 2005-12-27 21:51:33

AndyRTR
Developer
From: Magdeburg/Germany
Registered: 2005-10-07
Posts: 1,640

Re: Delay whilst mounting HDDs on bootup

it´s quiet normal. reiserfs takes much longer to mount comparing to ext3 at boot.

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#7 2005-12-27 21:55:33

Komodo
Member
From: Oxford, UK
Registered: 2005-11-03
Posts: 674

Re: Delay whilst mounting HDDs on bootup

Man, that's really irritating.... no-one's ever informed me of that.

Cheers for clearing that up Andy.

Is there any linux app you know of that will enable me to non-destructively convert a partition from reiserfs to ext3?


.oO Komodo Dave Oo.

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#8 2005-12-27 23:57:53

iphitus
Forum Fellow
From: Melbourne, Australia
Registered: 2004-10-09
Posts: 4,927

Re: Delay whilst mounting HDDs on bootup

nop there is no such app

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#9 2005-12-28 00:03:58

Gullible Jones
Member
Registered: 2004-12-29
Posts: 4,863

Re: Delay whilst mounting HDDs on bootup

No, you'll just have to copy your stuff, format, copy it back, and reinstall.

A bit of advice though: if you use ext3, ALWAYS use the dir_index option when making the filesystem, like so:

mke2fs -j -O dir_index /dev/hdXY

With dir_index, ext3 is almost as fast as Reiser4 when dealing with very large directories. Without dir_index, it can be unbearably slow.

(If you don't wish to use ext3, try JFS - it performs similarly to ReiserFS, though pacman searches might take slightly more time. I would not recommend XFS unless you have a very fast hard drive though.)

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#10 2005-12-28 00:05:34

Komodo
Member
From: Oxford, UK
Registered: 2005-11-03
Posts: 674

Re: Delay whilst mounting HDDs on bootup

Gullible Jones wrote:

if you use ext3, ALWAYS use the dir_index option when making the filesystem

That's VERY useful information GJ, thanks for passing it on.

What's the word on reiser4? It supposed to be as good as it makes itself out to be?


.oO Komodo Dave Oo.

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#11 2005-12-28 01:02:22

iBertus
Member
From: Greenville, NC
Registered: 2004-11-04
Posts: 2,228

Re: Delay whilst mounting HDDs on bootup

Komodo wrote:

What's the word on reiser4? It supposed to be as good as it makes itself out to be?

Right now reiser4 is caught up in heated battle between Hans and the kernel dev team. It seems that Hans thinks reiser4 should be merged just because it's here and the kernel devs think it needs to comply with written coding standards, be easy to maintain.

Personally, I don't care much for reiser4 anymore and prefer to stick with JFS or similar. It doesn't have any great performance improvements of other filesystems that I can tell and it has caused several instances of changes in the reiser4 code post-release causing partitions to be unreadable by newly patched kernels. As Gullible Jones said, ext3 still has some tricks left that most people don't know about and it's been around long enough that most of these things are worked out.

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#12 2005-12-28 11:32:17

Komodo
Member
From: Oxford, UK
Registered: 2005-11-03
Posts: 674

Re: Delay whilst mounting HDDs on bootup

iBertus wrote:

ext3 still has some tricks left that most people don't know about and it's been around long enough that most of these things are worked out.

I guess you're right Bertus... the excellent speed tip from Gullible makes ext3 a whole lot more appealing big_smile

What are the advantages of having a journaling file system? Is it just that, because all changes to be written are queued in a file, if things go wrong then the filesystem can pick up where it left things?


.oO Komodo Dave Oo.

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#13 2005-12-28 17:05:56

Gullible Jones
Member
Registered: 2004-12-29
Posts: 4,863

Re: Delay whilst mounting HDDs on bootup

Pretty much. With ext2, a power outage can render things unreadable; with ext3, that probably won't happen.

(I speak from experience... That's why I will never, ever make a separate boot partition formatted in ext2.)

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#14 2005-12-28 18:14:00

Komodo
Member
From: Oxford, UK
Registered: 2005-11-03
Posts: 674

Re: Delay whilst mounting HDDs on bootup

Gullible Jones wrote:

With ext2, a power outage can render things unreadable

Worrying :?

So why would people still use ext2? Are there any advantages to using it?


.oO Komodo Dave Oo.

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#15 2005-12-28 20:00:05

Gullible Jones
Member
Registered: 2004-12-29
Posts: 4,863

Re: Delay whilst mounting HDDs on bootup

Yes, a journalled filesystem will not fit on a floppy or a very small partition, and there are ways of reading ext2 from Windows... Other than those, there's not really any good reason AFAIK.

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#16 2005-12-28 20:28:03

Komodo
Member
From: Oxford, UK
Registered: 2005-11-03
Posts: 674

Re: Delay whilst mounting HDDs on bootup

It all makes sense now... ok, cheers for clearing that up GJ wink


.oO Komodo Dave Oo.

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