Archive for February, 2013

Reorg Of A RAID/LVM System

I have a system with 4 disk drives, two 512 Gb and two 1 Tb. It look like this:

CentOS release 5.9 (Final)

Disk /dev/sda: 500.1 GB, 500107862016 bytes Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes Disk /dev/sdc: 500.1 GB, 500107862016 bytes Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
================================================================
Disk /dev/sda: 500.1 GB, 500107862016 bytes
16 heads, 63 sectors/track, 969021 cylinders Units = cylinders of 1008 * 512 = 516096 bytes

Device Boot Start End Blocks Id System
/dev/sda1 * 1 1985 1000408+ fd Linux raid autodetect
/dev/sda2 1986 9923 4000752 82 Linux swap / Solaris
/dev/sda3 9924 969021 483385392 fd Linux raid autodetect

Disk /dev/sdb: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdb1 * 1 125 1004031 fd Linux raid autodetect
/dev/sdb2 126 624 4008217+ 82 Linux swap / Solaris
/dev/sdb3 625 121601 971747752+ fd Linux raid autodetect

Disk /dev/sdc: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdc1 * 1 125 1004031 fd Linux raid autodetect
/dev/sdc2 126 4096 31897057+ 82 Linux swap / Solaris
/dev/sdc3 4097 60801 455482912+ fd Linux raid autodetect

Disk /dev/sdd: 1000.2 GB, 1000204886016 bytes
255 heads, 63 sectors/track, 121601 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes

Device Boot Start End Blocks Id System
/dev/sdd1 * 1 125 1004031 fd Linux raid autodetect
/dev/sdd2 126 624 4008217+ 82 Linux swap / Solaris
/dev/sdd3 625 121601 971747752+ fd Linux raid autodetect

The four 1 GB partitions (sd[abcd]1) are configured as a RAID 1 array with a single ext4
filesystem mounted as /boot.

Swap is Swap…

the two smaller drives (sd[ac]3) partitions are configured as a RAID 1 array containing an LVM
physical volume (md1). the two larger drives (sd[bd]3) are configured as a RAID 1 array containing an LVM physical volume (md2).


# pvdisplay
— Physical volume -

1 Comment


CESA-2013:0581 Moderate CentOS 5 Libxml2 Update

CentOS Errata and Security Advisory 2013:0581 Moderate

Upstream details at : https://rhn.redhat.com/errata/RHSA-2013-0581.html

The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename )

i386:
37744da0abe7d75464da9498d9ad2575c550e875cf068f0d00e30d8c9221b0b5 libxml2-2.6.26-2.1.21.el5_9.1.i386.rpm
4a444273456b1fdba7330b37e6033715b7d471530e14c2d6f0e516fc6897f205 libxml2-devel-2.6.26-2.1.21.el5_9.1.i386.rpm
144b9741b82d70cb82de090609482987d34d6cdac657a9fbb9954f569cbdbaa0 libxml2-python-2.6.26-2.1.21.el5_9.1.i386.rpm

x86_64:
37744da0abe7d75464da9498d9ad2575c550e875cf068f0d00e30d8c9221b0b5 libxml2-2.6.26-2.1.21.el5_9.1.i386.rpm a68601aad7a108fc5dce83d8d107a8e4850afcd58e378360a34123b6b639435b libxml2-2.6.26-2.1.21.el5_9.1.x86_64.rpm
4a444273456b1fdba7330b37e6033715b7d471530e14c2d6f0e516fc6897f205 libxml2-devel-2.6.26-2.1.21.el5_9.1.i386.rpm f528e385046af9543854df65f50ab7214e2d62812752e52f3a2e98712ad4c268 libxml2-devel-2.6.26-2.1.21.el5_9.1.x86_64.rpm cbe3c0ecbe4dd9f6696e440617862ee876999b7f4c3d7eab36214aee74008d01 libxml2-python-2.6.26-2.1.21.el5_9.1.x86_64.rpm

Source:
30a7bb607148784ac9bf6e76a4ab1914df94d4a2cbf2f5d23c7a4665aeef99c7 libxml2-2.6.26-2.1.21.el5_9.1.src.rpm

No Comments


CEBA-2013:0575 CentOS 5 Libvirt Update

CentOS Errata and Bugfix Advisory 2013:0575

Upstream details at : https://rhn.redhat.com/errata/RHBA-2013-0575.html

The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename )

i386:
5d226b37e3a94f164d50aef45b3f6b7b0a64788404270fe021f5c6efc9e37dba libvirt-0.8.2-29.el5_9.1.i386.rpm
0a581b651ae75683f2448834b6bf2121d8ce2387c496bbced6999680a2202f83 libvirt-devel-0.8.2-29.el5_9.1.i386.rpm a8ff6a0b9fef2f20c5901bedaa2cb23d7d2350f607e9d04c8fe40949990f8540 libvirt-python-0.8.2-29.el5_9.1.i386.rpm

x86_64:
5d226b37e3a94f164d50aef45b3f6b7b0a64788404270fe021f5c6efc9e37dba libvirt-0.8.2-29.el5_9.1.i386.rpm f0d871e9abda492ba0bfb48ae25a0c0594d73c361a95464a5511c4779c844f0d libvirt-0.8.2-29.el5_9.1.x86_64.rpm
0a581b651ae75683f2448834b6bf2121d8ce2387c496bbced6999680a2202f83 libvirt-devel-0.8.2-29.el5_9.1.i386.rpm
5fea1922e24b927f92abe455120d70bbee8251374af868c7af90c7ccee4e8bf5 libvirt-devel-0.8.2-29.el5_9.1.x86_64.rpm
7456a0536afef03552b2b92293017e8bae17fc60536dcd3bf4a6053e62628ba6 libvirt-python-0.8.2-29.el5_9.1.x86_64.rpm

Source:
5ca698b978950796c6098fb3c1d3ce8dd7f4f963663daa068cd744b3a4331a41 libvirt-0.8.2-29.el5_9.1.src.rpm

No Comments


CESA-2013:0568 Important CentOS 5 Dbus-glib Update

CentOS Errata and Security Advisory 2013:0568 Important

Upstream details at : https://rhn.redhat.com/errata/RHSA-2013-0568.html

The following updated files have been uploaded and are currently syncing to the mirrors: ( sha256sum Filename )

i386:
0223ca642952e05ebc211d0a4c70d384c940ac27b099bc3d75b54ca68f9c0f90 dbus-glib-0.73-11.el5_9.i386.rpm
62777a9ce986e177104fe0e1a0f0426f301da6507598d498e9ce33fe2393455a dbus-glib-devel-0.73-11.el5_9.i386.rpm

x86_64:
0223ca642952e05ebc211d0a4c70d384c940ac27b099bc3d75b54ca68f9c0f90 dbus-glib-0.73-11.el5_9.i386.rpm
04b24df1ce6e666a9270a596a472f35feeaf6b838b8c243d4a84b9ca24de2520 dbus-glib-0.73-11.el5_9.x86_64.rpm
62777a9ce986e177104fe0e1a0f0426f301da6507598d498e9ce33fe2393455a dbus-glib-devel-0.73-11.el5_9.i386.rpm
884d110f0c5379c6ca1fffdfbba09f54d92945dd81e6d212139189c113a20f57 dbus-glib-devel-0.73-11.el5_9.x86_64.rpm

Source:
35b7f75cbbb1386b4e632c74925555778b07f0701066f92bc336f5e52f6c6fc9 dbus-glib-0.73-11.el5_9.src.rpm

No Comments


What Can I Do To UNDERSTAND Why I Can’t Reach CentOS.org (but Everyone Else Can)?

What can I do to UNDERSTAND why, periodically, I can’t reach www.CentOS.org (but everyone else can)?

Every few months, http://www.CentOS.org just drops off for me and for me only. It’s not the web site, because I can reach it via a proxy (e.g., TOR browser bundle) and other tests show it to be alive (e.g., http://www.downforeveryoneorjustme.com/CentOS.org or http://traceroute.monitis.com).

But, for me, I just can’t reach it by any means.

Mike Easter kindly determined “CentOS.org does not echo ICMP or UDP
pings, only TCP, and its associated netblock level3 doesn’t echo UDP, but does echo ICMP and TCP.”

But, for me, this is what a traceroute returned just now on CentOS:

$ traceroute www.CentOS.org
… early hops removed …
16 ae-6-6.ebr2.LosAngeles1.Level3.net (4.69.148.201) 211.850 ms ae-3-3.ebr3.Dallas1.Level3.net (4.69.132.78) 205.221 ms ae-6-6.ebr2.LosAngeles1.Level3.net (4.69.148.201) 207.392 ms
17 ae-3-3.ebr3.Dallas1.Level3.net (4.69.132.78) 128.453 ms ae-73-73.csw2.Dallas1.Level3.net (4.69.151.145) 160.451 ms ae-93-93.csw4.Dallas1.Level3.net (4.69.151.169) 160.437 ms
18 ae-83-83.csw3.Dallas1.Level3.net (4.69.151.157) 165.923 ms ae-1-60.edge3.Dallas1.Level3.net (4.69.145.8) 165.920 ms 178.414 ms
19 LAYERED-TEC.edge3.Dallas1.Level3.net (4.71.170.6) 241.537 ms 244.324 ms ae-3-80.edge3.Dallas1.Level3.net (4.69.145.136) 244.318 ms
20 * LAYERED-TEC.edge3.Dallas1.Level3.net (4.71.170.6) 244.291 ms 244.250 ms
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26 * * *
27 * * *
28 * * *
29 * * *
30 * * *

Here is a screenshot (modified to remove early hops) using mtr:
$ mtr www.CentOS.org
http://www2.picturepush.com/photo/a/12303130/img/12303130.png

My related questions are:
1. What can I do (on CentOS) to UNDERSTAND this problem?
2. Why does this problem happen every few months to me (and to just me)?
3. How can the net be this arbitrary and still work?

, , , , ,

28 Comments


CentOS6.4 Via CR-repo; Boot Problems -solved By Removing Kmod-nvidia

Op 28-02-13 10:04, jvermeulen schreef:

Solved after removing Elrepo-package kmod-nvidia. I had that installed for being able to use an external monitor.

greetings, J.

3 Comments


CentOS 6.4 In The Making Perhaps?

I see Johnny Hughes has released CR-updates for CentOS 6.

Is CentOS 6.4 brewing yet then? 8-)

10 Comments