Discuss January 2011

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276 participants
289 discussions

Static assignment of SCSI device names?
by Chuck Munro 27 Jan '11

27 Jan '11

Hello list members, In CentOS-5.5 I'm trying to achieve static assignment of SCSI device names for a bunch of RAID-60 drives on a Supermicro motherboard. The "scsi_id" command identifies all drives ok. The board has one SATA controller and three SAS/SATA controllers ... standard on-board ICH-10 ATA channels, an on-board LSI SAS/SATA controller, and two add-on SAS/SATA contoller cards. There are 13 drives in all, spread across the four controllers, all configured for Linux software RAID. The problem is in management of the drive names and figuring out which drive to pull in case of failure. Unfortunately the BIOS scan detects only the three drives connected to the ICH-10 SATA controller. That's ok because that's where the RAID-1 boot drives are. However, when the kernel starts it assigns those drives last, not first. For this reason I want to use a set of udev rules to assign specific names to the drives plugged into specific ports (to maintain my sanity :-) ). Identifying drives by their ID string (which includes the drive's serial number) and assigning names in the rules works ok. BUT, what happens when I have to swap out a failed drive? The serial number (and possibly model number) changes, and the udev assignment should fail, probably assigning an unexpected /dev/sd? name. RAID rebuild would choke until I change the MD device assignment. Is it possible to assign SCSI drive names by hardware path instead? I especially want the three RAID1+spare boot drives to always be assigned sda/sdb/sdc, because that sorts out other issues I'm having in CentOS-5. In the udev rules file I tried piping the output of "scsi_id -g -i -u -s /block/..." through "cut" to extract the path, but I get no match string when I run "udevtest" against that block device. Does the "PROGRAM==....." clause not recognize the pipe symbol? I tried a little shellscript to provide the RESULT match string, but udevtest didn't like that. Is there a supported way to predictably assign a drive name according to the hardware port it's plugged into ... it would make swapping drives a lot easier, since it becomes 'drive-id-string' agnostic. Better yet, is there any way to tell the kernel the order in which to scan the controllers? I'm also hoping the problem doesn't radically change when I install CentOS-6 on this box. I'm using CentOS-5 just to get practice in using KVM and RAID-60. Thanks for any advice you can offer. Chuck

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how to unmount an NFS share when the NFS server is unavailable?
by Rudi Ahlers 27 Jan '11

27 Jan '11

Hi All, How do I unmount an NFS share when the NFS server is unaivalable? I tried "umount /bck" but it "hangs" indefinitely "umount -f /bck" tells me the mount if busy and I can't unmount it: root@saturn:[~]$ umount -f /bck umount2: Device or resource busy umount: /bck: device is busy umount2: Device or resource busy umount: /bck: device is busy This non-working NFS share is causing problems on the server and I need to unmount it until such a time when the NFS server (faulty NAS) is repaired. -- Kind Regards Rudi Ahlers SoftDux Website: http://www.SoftDux.com Technical Blog: http://Blog.SoftDux.com Office: 087 805 9573 Cell: 082 554 7532

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#!/bin/csh -v not work on CENTOS 5.5
by mcclnx mcc 27 Jan '11

27 Jan '11

We have several "csh" batch scripts using "#!/bin/csh -v". It work fine, before Centos 5.5. After cenos 5.5, it will NOT execute and only list history. Anyone know why? Thanks.

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CentOS-announce Digest, Vol 71, Issue 2
by centos-announce-request＠centos.org 27 Jan '11

27 Jan '11

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2010:0936 Important CentOS 4 i386 kernel - security and bug fix update (Tru Huynh) 2. CESA-2010:0936 Important CentOS 4 x86_64 kernel - security and bug fix update (Tru Huynh) 3. CESA-2010:0950 Moderate CentOS 4 i386 apr-util - security update (Tru Huynh) 4. CESA-2010:0950 Moderate CentOS 4 x86_64 apr-util - security update (Tru Huynh) 5. CESA-2010:0966 Critical CentOS 4 i386 firefox - security update (Tru Huynh) 6. CESA-2010:0966 Critical CentOS 4 x86_64 firefox - security update (Tru Huynh) 7. CESA-2010:0967 Critical CentOS 4 i386 seamonkey - security update (Tru Huynh) 8. CESA-2010:0967 Critical CentOS 4 x86_64 seamonkey - security update (Tru Huynh) 9. CESA-2010:0968 Moderate CentOS 4 i386 thunderbird - security update (Tru Huynh) 10. CESA-2010:0968 Moderate CentOS 4 x86_64 thunderbird - security update (Tru Huynh) 11. CESA-2010:0970 Critical CentOS 4 i386 exim - security update (Tru Huynh) 12. CESA-2010:0970 Critical CentOS 4 x86_64 exim - security update (Tru Huynh) 13. CESA-2010:0977 Moderate CentOS 4 i386 openssl - security update (Tru Huynh) 14. CESA-2010:0977 Moderate CentOS 4 x86_64 openssl - security update (Tru Huynh) 15. CESA-2010:0981 Critical CentOS 4 i386 HelixPlayer removal (Tru Huynh) 16. CESA-2010:0981 Critical CentOS 4 x86_64 HelixPlayer removal (Tru Huynh) 17. CESA-2010:1000 Important CentOS 4 i386 bind - security update (Tru Huynh) 18. CESA-2010:1000 Important CentOS 4 x86_64 bind - security update (Tru Huynh) 19. CESA-2011:0013 Moderate CentOS 4 i386 wireshark - security update (Tru Huynh) 20. CESA-2011:0013 Moderate CentOS 4 x86_64 wireshark - security update (Tru Huynh) 21. CESA-2011:0153 Moderate CentOS 4 i386 exim - security update (Tru Huynh) 22. CESA-2011:0153 Moderate CentOS 4 x86_64 exim - security update (Tru Huynh) 23. CESA-2011:0162 Important CentOS 4 i386 kernel - security and bug fix update (Tru Huynh) 24. CESA-2011:0162 Important CentOS 4 x86_64 kernel - security and bug fix update (Tru Huynh) ---------------------------------------------------------------------- Message: 1 Date: Thu, 27 Jan 2011 09:44:20 +0100 From: Tru Huynh <tru(a)centos.org> Subject: [CentOS-announce] CESA-2010:0936 Important CentOS 4 i386 kernel - security and bug fix update To: centos-announce(a)centos.org Message-ID: <20110127084420.GA24522(a)sillage.bis.pasteur.fr> Content-Type: text/plain; charset="us-ascii" CentOS Errata and Security Advisory CESA-2010:0936 kernel security update for CentOS 4 i386: https://rhn.redhat.com/errata/RHSA-2010-0936.html The following updated file has been uploaded and is currently syncing to the mirrors: i386: updates/i386/RPMS/kernel-2.6.9-89.33.1.EL.i586.rpm updates/i386/RPMS/kernel-2.6.9-89.33.1.EL.i686.rpm updates/i386/RPMS/kernel-devel-2.6.9-89.33.1.EL.i586.rpm updates/i386/RPMS/kernel-devel-2.6.9-89.33.1.EL.i686.rpm updates/i386/RPMS/kernel-hugemem-2.6.9-89.33.1.EL.i686.rpm updates/i386/RPMS/kernel-hugemem-devel-2.6.9-89.33.1.EL.i686.rpm updates/i386/RPMS/kernel-smp-2.6.9-89.33.1.EL.i586.rpm updates/i386/RPMS/kernel-smp-2.6.9-89.33.1.EL.i686.rpm updates/i386/RPMS/kernel-smp-devel-2.6.9-89.33.1.EL.i586.rpm updates/i386/RPMS/kernel-smp-devel-2.6.9-89.33.1.EL.i686.rpm updates/i386/RPMS/kernel-xenU-2.6.9-89.33.1.EL.i686.rpm updates/i386/RPMS/kernel-xenU-devel-2.6.9-89.33.1.EL.i686.rpm updates/i386/RPMS/kernel-doc-2.6.9-89.33.1.EL.noarch.rpm source: updates/SRPMS/kernel-2.6.9-89.33.1.EL.src.rpm You may update your CentOS-4 i386 installations by running the command: yum update kernel Tru -- Tru Huynh (mirrors, CentOS i386/x86_64 Package Maintenance) http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xBEFA581B

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Re: [CentOS] Ext4 on CentOS 5.5 x64
by James Hogarth 27 Jan '11

27 Jan '11

On 27 January 2011 15:06, Sorin Srbu <sorin.srbu(a)orgfarm.uu.se> wrote: > Hi all, > > For those of you that have been using the ext4 technology preview on CentOS > 5.5, how has it panned out? Does it perform as expected? How do you feel the > stability, creation of the FS and the administration of it is? Ideas and > comments welcome. > Well for what it's worth it worked out well enough for Redhat that it is a fully supported filesystem in 5.6 and the default in 6.0... same admin tools as ext3 so not much to learn as it were...

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Access to a Power6/Power7 machine?
by Timo Schoeler 27 Jan '11

27 Jan '11

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi, is there anybody here who has access to such a machine and could test errrr... 'some software' there? Please mail me privately. Thanks & best, Timo -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) iD8DBQFNQYqAfg746kcGBOwRArE2AJ4+qtS3i0V6a0Y6WocbpGZfne7Q/wCgsphj 1JcOBKH2RuleIQ3X80XFfT4= =AEdz -----END PGP SIGNATURE-----

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Ext4 on CentOS 5.5 x64
by Sorin Srbu 27 Jan '11

27 Jan '11

Hi all, For those of you that have been using the ext4 technology preview on CentOS 5.5, how has it panned out? Does it perform as expected? How do you feel the stability, creation of the FS and the administration of it is? Ideas and comments welcome. Thanks. -- BW, Sorin ----------------------------------------------------------- # Sorin Srbu [Sysadmin, Systems Engineer] # Dept of Medicinal Chemistry, Phone: +46 (0)18-4714482 >3 signals> GSM # Div of Org Pharm Chem, Mobile: +46 (0)701-718023 # Box 574, Uppsala University, Fax: +46 (0)18-4714482 # SE-751 23 Uppsala, Sweden Visit: BMC, Husargatan 3, D5:512b # Web: http://www.orgfarm.uu.se ----------------------------------------------------------- # () ASCII ribbon campaign - Against html E-mail # /\ # # MotD follows: # Legacy MS Tag: Windows has crashed more systems than Michelangelo.

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Help - Seeking recommendations-script to install on CENT OS web server for backup to Network Attached Storage
by Steve Eisenberg 27 Jan '11

27 Jan '11

Hello: I wanted to know if anyone on the list can recommend one or more scripts to install on a CENT OS web server that allows you to back up the entire box to network attached storage? Many thanks, Steve Eisenberg steve.eisenberg(a)gmail.com

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Package updates for 5.4?
by Mitch Patenaude 27 Jan '11

27 Jan '11

We're running a large cluster, and are leery of upgrading them all to 5.5, but would like to find the latest security patches. Is there a repo for this? I can't seem to find a 5.4 specific update repo with anything since last March. Is 5.4 EOL'd? Thanks, -- Mitch

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Re: [CentOS] SSH Automatic Log-on Failure - Centos 5.5
by James Bensley 27 Jan '11

27 Jan '11

Hello all, I've been reading this thread and have a question. I would like to set up passwordless ssh between two servers for some automated tasks but I don't like the paswordless key's option. How can I supply a passphrase when generating my keys but still have this process automated? --James. (This email was sent from a mobile device)

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Discuss January 2011