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From: Phil Turmel <philip@turmel.org>
To: Simon Mcnair <simonmcnair@gmail.com>
Cc: NeilBrown <neilb@suse.de>,
	"linux-raid@vger.kernel.org" <linux-raid@vger.kernel.org>
Subject: Re: Linux software RAID assistance
Date: Sat, 19 Feb 2011 10:30:16 -0500	[thread overview]
Message-ID: <4D5FE208.5020700@turmel.org> (raw)
In-Reply-To: <AANLkTi=MZ4vo+H16UMuUsVSA2_D-Wp+sFP-5RqOksjXm@mail.gmail.com>

On 02/19/2011 03:43 AM, Simon Mcnair wrote:
> Phil,
> Sorry for the spamming, but I'm just keeping you informed :-).
> 
> proxmox:/home/simon# ./block2gz.sh sdd /media/ntfs3g/sdb
> 953869+1 records in
> 953869+1 records out
> 1000204886016 bytes (1.0 TB) copied, 95384 s, 10.5 MB/s

[trim /]

> Have just started sdj,sdk,sdl,sdm.  I was thinking of renaming the
> .gz's with the serial number as this would seem to me as more useful,
> is this a good idea ?

Yes.  I guess they'll finish some time tomorrow?

> These numbers are not at all reflective of the drive or controller
> speed as I took the lazy route and was writing 2 sets of images at the
> same time to the same drive and in addition gzip was also running
> (although not really stressing the system from what I could tell).

The CPU was busy, but not overloaded.  The per-drive data rates were 1/5th to 1/10th what I would have expected.  The Asus P6T SE motherboard has a lot of bandwidth.  Something's odd.

Can you attach a copy of your dmesg?

> I suspect also that the drives may be pretty fragmented as the space
> was not allocated at the start of the write, so that may have had some
> impact too.

Ntfs-3g can push 70+ MB/s onto my heavily fragged Windows laptop partition with only 50% of a Core2 Duo.  I doubt that's it.

Phil

  reply	other threads:[~2011-02-19 15:30 UTC|newest]

Thread overview: 64+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2011-02-10 16:16 Linux software RAID assistance Simon McNair
2011-02-10 18:24 ` Phil Turmel
2011-02-15  4:53 ` NeilBrown
2011-02-15  8:48   ` Simon McNair
2011-02-15 14:51   ` Phil Turmel
2011-02-15 19:04     ` Simon McNair
2011-02-15 19:37       ` Phil Turmel
2011-02-15 19:45         ` Roman Mamedov
2011-02-15 21:09           ` Simon McNair
2011-02-17 15:10           ` Simon Mcnair
2011-02-17 15:42             ` Roman Mamedov
2011-02-18  9:13               ` Simon McNair
2011-02-18  9:38                 ` Robin Hill
2011-02-18 10:38                   ` Simon Mcnair
2011-02-19 11:46                     ` Jan Ceuleers
2011-02-19 12:40                       ` Simon McNair
2011-02-19 17:37                         ` Jan Ceuleers
2011-02-16 13:51     ` Simon McNair
2011-02-16 14:37       ` Phil Turmel
2011-02-16 17:49         ` Simon McNair
2011-02-16 18:14           ` Phil Turmel
2011-02-16 18:18             ` Simon McNair
2011-02-16 18:22               ` Phil Turmel
2011-02-16 18:25                 ` Phil Turmel
2011-02-16 18:52                   ` Simon McNair
2011-02-16 18:57                     ` Phil Turmel
2011-02-16 19:07                       ` Simon McNair
2011-02-16 19:10                         ` Phil Turmel
2011-02-16 19:15                           ` Simon McNair
2011-02-16 19:36                             ` Phil Turmel
2011-02-16 21:28                               ` Simon McNair
2011-02-16 21:30                                 ` Phil Turmel
2011-02-16 22:44                                   ` Simon Mcnair
2011-02-16 23:39                                     ` Phil Turmel
2011-02-17 13:26                                       ` Simon Mcnair
2011-02-17 13:48                                         ` Phil Turmel
2011-02-17 13:56                                           ` Simon Mcnair
2011-02-17 14:34                                             ` Simon Mcnair
2011-02-17 16:54                                               ` Phil Turmel
2011-02-19  8:43                                                 ` Simon Mcnair
2011-02-19 15:30                                                   ` Phil Turmel [this message]
     [not found]                                                     ` <AANLkTinOXJWRw_et2U43R_T9XPBzQLnN56Kf2bOAz=_c@mail.gmail.com>
2011-02-19 16:19                                                       ` Phil Turmel
2011-02-20  9:56                                                         ` Simon Mcnair
2011-02-20 19:50                                                           ` Phil Turmel
2011-02-20 23:17                                                             ` Simon Mcnair
2011-02-20 23:39                                                               ` Phil Turmel
2011-02-22 17:12                                                                 ` Simon Mcnair
2011-02-22 17:14                                                                   ` Simon Mcnair
2011-02-22 18:23                                                                     ` Phil Turmel
2011-02-22 18:36                                                                       ` Simon McNair
2011-02-22 19:06                                                                         ` Phil Turmel
2011-02-18  9:31                               ` Simon Mcnair
2011-02-18 13:16                                 ` Phil Turmel
2011-02-18 13:21                                   ` Roberto Spadim
2011-02-18 13:26                                     ` Phil Turmel
2011-02-18 13:29                                   ` Simon Mcnair
2011-02-18 13:34                                     ` Phil Turmel
2011-02-18 14:12                                       ` Simon McNair
2011-02-18 16:10                                         ` Phil Turmel
2011-02-18 16:38                                           ` Roberto Spadim
     [not found]                               ` <AANLkTi=RmR5nVnmFLuqK5anHc3WDPxjuYjitT6+5wAqS@mail.gmail.com>
2011-02-20 18:48                                 ` Phil Turmel
2011-02-20 19:25                                   ` Simon Mcnair
2011-02-19  8:49             ` Simon Mcnair
2011-02-16 13:56     ` Simon McNair

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