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Bug#535151: marked as done (linux-image-2.6-amd64: raid5 wrong sync speed calculation)

Your message dated Sat, 03 Oct 2009 23:14:30 +0100
with message-id <1254608070.2395.10.camel@localhost>
and subject line Re: linux-image-2.6-amd64: raid5 wrong sync speed calculation
has caused the Debian Bug report #535151,
regarding linux-image-2.6-amd64: raid5 wrong sync speed calculation
to be marked as done.

This means that you claim that the problem has been dealt with.
If this is not the case it is now your responsibility to reopen the
Bug report if necessary, and/or fix the problem forthwith.

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-- 
535151: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=535151
Debian Bug Tracking System
Contact owner@bugs.debian.org with problems
--- Begin Message --- 
Package: linux-image-2.6-amd64
Version: 2.6.26+17+lenny1
Severity: normal


I created a raid5 md (/dev/md1) device of 16x1TB SATA disks.
When I look at /proc/mdstat i see this:

---
Personalities : [raid10] [raid6] [raid5] [raid4] 
md1 : active raid5 sdo1[15] sdy1[14] sdx1[13] sdw1[12] sdv1[11] sdu1[10] sdt1[9] sds1[8] sdr1[7] sdq1[6] sdp1[5] sdn1[4] sdm1[3] sdl1[2] sdk1[1] sdj1[0]
      14651399040 blocks level 5, 128k chunk, algorithm 2 [16/16] [UUUUUUUUUUUUUUUU]
      [==>..................]  resync = 13.4% (131128536/976759936) finish=202.0min speed=69742K/sec
      
md0 : active raid10 sdb1[0] sdi1[7] sdh1[6] sdg1[5] sdf1[4] sde1[3] sdd1[2] sdc1[1]
      1757349888 blocks 64K chunks 2 near-copies [8/8] [UUUUUUUU]
      
unused devices: <none>
---

The speed is around 70Mb/s the whole time and the finish time starts at about 210 minutes.
But if I calculate this right:

16 disks raid5 = 15TB netto
15TB/210 min = 71GB/min = 1,19 GB/s

Kind regards,
Caspar Smit

-- System Information:
Debian Release: 5.0.2
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-2-amd64 (SMP w/8 CPU cores)
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages linux-image-2.6-amd64 depends on:
ii  linux-image-2.6.26-2-amd64    2.6.26-17  Linux 2.6.26 image on AMD64

linux-image-2.6-amd64 recommends no packages.

linux-image-2.6-amd64 suggests no packages.

-- no debconf information

--- End Message ---
--- Begin Message --- 
Bastian Blank explained that this is not a bug.

Ben.

-- 
Ben Hutchings
Always try to do things in chronological order;
it's less confusing that way.

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