Discuss March 2008

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373 discussions

Partition/filesystem expansion difficulties
by Hugh E Cruickshank 17 Mar '08

17 Mar '08

CentOS 4.6 Hi All: I am now officially stumped. I have tried everything that can think of and I have googled until I am blue in the face and tried just about everything that I could find that looked the least bit like it might apply and still no (or at least partial) joy. I am going to cram as much information into this email as I can and hope that someone out there can either tell me what I am doing wrong or point me in a new direction for research. The hardware: We have an Acer G700 server which comes with 8 internal hot swap SCSI bays connected to an Adaptec SCSI HBA. There are two banks of 4 drives connect to each of the two channels of the Adaptec HBA. To this we have added an IBM EXP400 external array with 12 hot swap SCSI drives connected to an LSI MegaRAID HBA. 36GB drives were used throughout. The external drives were configured as 6 mirror pairs through the MegaRAID BIOS. The OS install: When I installed CentOS 4 originally I allowed the installer to configure the 8 internal drives with software mirroring and the external drives as a striped set effectively making the external disk array a RAID 10 array. The original problem: Our boot drive failed which did not cause an immediate problem as the system kept on running. The real problem was that I had already used all the spare drives I had on-hand and I could not source a replacement drive that matched on size and speed (10K). The original solution: I then had what I thought was a good idea and I purchase three 146GB 10K drives. I would replace the two 36GB drives used in the system mirrored pair with 146GB drives and have one 146GB spare. I would then be able to free up a 36GB to use as a spare for the other three pairs of drives. This proved to be easier said then done but I did eventually get it done by using Norton Ghost to copy the good mirrored 36GB drive on to two of the 146GB drives and then using grub to install the bootloader (which I found out the hard way is NOT installed on the mirrored drive - ARGHHHHHH!). However I did get it done but with one minor problem. The current problem: The two 146GB drives are now partitioned as 36GB and I want to expand the partitions and the installed filesystems to use the additional space available on the drives. The current partition looked like: Device Boot Start End Blocks Id System /dev/sda1 * 1 64 514048+ fd Linux raid autodetect /dev/sda2 65 1084 8193150 fd Linux raid autodetect /dev/sda3 1085 1339 2048287+ fd Linux raid autodetect /dev/sda4 1340 4462 25085466 f W95 Ext'd (LBA) /dev/sda5 1340 4462 25085466 fd Linux raid autodetect No problem I thought and proceeded make a Ghost copy of the boot drive and then used PartedMagic to expand both the last physical and logical partitions and the resident ext3 files system. Lucky thing I mad that Ghost copy and the filesystem turned out to be corrupt (could not find the super block). Restored from the backup. I then tried using PartedMagic to expanding just the last physical partition and that worked. The current fdisk for both sda and sde looks like: Device Boot Start End Blocks Id System /dev/sda1 * 1 64 514048+ fd Linux raid autodetect /dev/sda2 65 1084 8193150 fd Linux raid autodetect /dev/sda3 1085 1339 2048287+ fd Linux raid autodetect /dev/sda4 1340 17849 132616575 f W95 Ext'd (LBA) /dev/sda5 1340 4462 25085466 fd Linux raid autodetect I then tried to use resize2fs to expand the files systems but that did on work. No error, it just report that the filesystems were already at the full size. Today I tried to use: mdadm --grow /dev/md3 --size=max resize2fs /dev/md3 but again no joy (md3 is the filesystem in sda5/sde5). No errors but no change either. I even thought to look at LVM but, as far as I can tell, that is not being used in our case (all drives are listed and unregistered). The plea: If anyone has any thoughts on what I have been doing wrong or a new direction that I can research I would really appreciate it. From everything that I have read this should be doable. My next step is to backup the contents of the filesystem and then delete it, re-create it and restore the backup. If that is the only way of doing this then I will gladly do it but I still think I should be able to expand it in-place (just call me stubborn). TIA Regards, Hugh -- Hugh E Cruickshank, Forward Software, www.forward-software.com

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Bind Problem
by Joseph L. Casale 17 Mar '08

17 Mar '08

I have a DNS server which is not returning mx queries for some reason? The zone file is as follows: $TTL 1H @ IN SOA example.com. root.example.com. ( 1 ; serial# 3H ; refresh 1H ; retry 1W ; expire 1H ) ; minimum NS ns1.example.com. MX 10 mail TXT "v=spf1 a mx include:isp.com -all" example.com. A aaa.bbb.ccc.ddd ns1 A aaa.bbb.ccc.ddd mail A aaa.bbb.ccc.ddd The server is setup as with a caching only configuration with recursion turned off. Anyone have any idea what could be wrong? Thanks! jlc

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Running network services as a non-root user
by David Hláčik 17 Mar '08

17 Mar '08

Hi, I am using open source Alfresco( alfresco.com ), written in java, which has own code for FTP, CIFS (running on tomcat apache and java). I need to run tomcat5 as root in order to achieve that alfresco will bind ftp cifs on privileged ports (21 , 135 .). I am wondering, it is possible to allow user to bind on some privilleged port. Like having whole alfresco running under user alfresco and not root and able to bind on privileged ports? CentOS 5.1 Thanks! David

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what should I do?
by Sobari Tanuwijaya 17 Mar '08

17 Mar '08

Dear All, a friend of mine who has a small office want to have a configuration like this: * around 3 people can have full access to internet * around 1-2 people can just have email access (can send and receive email to any address) * the rest of the people in the company just can have internal email (can send and receive email just to/from the peer - on the same domain). I think I can use the squid to prevent the access using the browser, but what should I do to set the email configuration like that? I think I can install qmail for the MTA, but I don't know how to prevent several person just can send/receive email from the same domain, while the other can send/receive email to any address he wants to. Anybody kind enough to share how to do that? Thanks in advance for you help. -- Tanu --

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Re: [CentOS] Un Installing a hard drive in a Centos 5.1 box
by Pam Astor 17 Mar '08

17 Mar '08

----- Original Message ---- From: Karanbir Singh <mail-lists(a)karan.org> To: CentOS mailing list <centos(a)centos.org> Sent: Sunday, March 16, 2008 7:57:00 PM Subject: Re: [CentOS] Un Installing a hard drive in a Centos 5.1 box Pam Astor wrote: > [root@localhost ~]# df -h > Filesystem Size Used Avail Use% Mounted on > /dev/mapper/VolGroup00-LogVol00 > 901G 6.7G 848G 1% / > /dev/sda1 99M 18M 76M 20% /boot > tmpfs 1.9G 0 1.9G 0% /dev/shm yup, its all 1 Volume, you are going to need to shrink the lv's - then get your volgroup onto /dev/sda only. info on howto do that is in the lvm howto. also, I'd recommend you download the centos-5.1/livecd and actually do the work once booted from the livecd. shinking filesystems requires you to have the filesystem unmounted, so doing it from the livecd is the only way you are going to manage it here. Dang, I was afraid you were going to say that :) Oh well, guess I'm going to have fun the next day or two learning about linux file systems. Thanks much! -- Karanbir Singh : http://www.karan.org/ : 2522219@icq _______________________________________________ CentOS mailing list CentOS(a)centos.org http://lists.centos.org/mailman/listinfo/centos ____________________________________________________________________________________ Looking for last minute shopping deals? Find them fast with Yahoo! Search. http://tools.search.yahoo.com/newsearch/category.php?category=shopping

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Firefox 3
by Niki Kovacs 17 Mar '08

17 Mar '08

Hi, I just read the release announcement for RHEL 5.2beta: https://www.redhat.com/archives/rhelv5-announce/2008-March/msg00000.html And something caught my eye: --8<----------------------------------------- * Laptop and Desktop Enhancement + Suspend and Hibernate improvements + Re-base of the top Desktop applications - Evolution 2.12.3 - Firefox 3 - OpenOffice 2.3.0 - Thunderbird 2.0 + Updated graphics drivers --8<----------------------------------------- I see that the folks from Red Hat decided to completely ignore Firefox 2.0: an eloquent detail. Now it's more than once that I've read good things about Firefox 3. Much less RAM-hungry than it's predecessors, excellent standards compliance, much more stable. What's the best way to get Firefox 3 on my CentOS 5.1? Is there some RPM for RHEL somewhere? Some SRPM? Or simply wait patiently for CentOS 5.2? Aside: I use XFCE, not GNOME, so I don't have to go through the chore of updating some core GNOME components (like Yelp). Cheers, Niki

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Re: [CentOS] Un Installing a hard drive in a Centos 5.1 box
by Pam Astor 16 Mar '08

16 Mar '08

----- Original Message ---- From: Karanbir Singh <mail-lists(a)karan.org> To: CentOS mailing list <centos(a)centos.org> Sent: Sunday, March 16, 2008 6:44:33 PM Subject: Re: [CentOS] Un Installing a hard drive in a Centos 5.1 box Pam Astor wrote: > OK this is what I have when I run mount - does it appear that > I have both drives on one volume?: > > /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw) > what output to do you get from : pvdisplay; vgdisplay; lvdisplay [root@localhost ~]# pvdisplay; vgdisplay; lvdisplay --- Physical volume --- PV Name /dev/sdb1 VG Name VolGroup00 PV Size 465.76 GB / not usable 9.50 MB Allocatable yes (but full) PE Size (KByte) 32768 Total PE 14904 Free PE 0 Allocated PE 14904 PV UUID IAmE1f-dCMo-c035-cSQQ-g9yE-6yOo-mfKhHv --- Physical volume --- PV Name /dev/sda2 VG Name VolGroup00 PV Size 465.66 GB / not usable 3.56 MB Allocatable yes (but full) PE Size (KByte) 32768 Total PE 14901 Free PE 0 Allocated PE 14901 PV UUID fi5A7U-dao0-ruuP-TSc0-LfFu-7yRL-iKnwGr --- Volume group --- VG Name VolGroup00 System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 2 Act PV 2 VG Size 931.41 GB PE Size 32.00 MB Total PE 29805 Alloc PE / Size 29805 / 931.41 GB Free PE / Size 0 / 0 VG UUID pwO7bQ-0eRs-W8O4-b4uf-hYe6-JIm6-27p8wu --- Logical volume --- LV Name /dev/VolGroup00/LogVol00 VG Name VolGroup00 LV UUID avhFcY-30N6-2BPz-A89X-Ai0V-v5B7-xxzhIe LV Write Access read/write LV Status available # open 1 LV Size 929.47 GB Current LE 29743 Segments 2 Allocation inherit Read ahead sectors 0 Block device 253:0 --- Logical volume --- LV Name /dev/VolGroup00/LogVol01 VG Name VolGroup00 LV UUID ZW2z5f-5x58-0vDI-ru5S-iZge-mVE6-yVp160 LV Write Access read/write LV Status available # open 1 LV Size 1.94 GB Current LE 62 Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:1 And... [root@localhost ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 901G 6.7G 848G 1% / /dev/sda1 99M 18M 76M 20% /boot tmpfs 1.9G 0 1.9G 0% /dev/shm [root@localhost ~]# ____________________________________________________________________________________ Never miss a thing. Make Yahoo your home page. http://www.yahoo.com/r/hs

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Backup Question
by Joseph L. Casale 16 Mar '08

16 Mar '08

We are migrating an LTO2 library off Veritas and NTBackup on a Windows Server to a Linux Server with either Bacula or Amanda. Originally, the Windows server used scripts to sync changes from various other Windows servers using Robocopy to a locally attached set of volumes, then ran the backup nightly (Full's were always done). I now had hoped to rsync the Samba shares to a local replica on the Linux Server and then start the backup every night after it finishes. Would this be the most efficient way to do this, or are there better tools for this? I need an additional replica of the data, so using the Windows Bacula client doesn't help, and I must be able to only replicate the changes or I'll miss my backup window based on the volume of data. Thanks for any suggestions, jlc

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Re: [CentOS] Un Installing a hard drive in a Centos 5.1 box
by Pam Astor 16 Mar '08

16 Mar '08

> When I physically removed the drive and restarted the PC, centos would > not boot up and went into a kernel panic. I'm sure I'm supposed to > somehow unmount the thing before I do this, and that's my question - how > do I un-install the hard drive - software wise - so that on next boot > up, centos don't go crazy looking for it? If the machine panics at boot time, there is a good chance that you installed with LVM and its got both the drives into one volume. You will need to reinstall that second harddrive, then work out the process of shrinking the filesystem down to only 1 drive, then remove the second drive. The scope of this work might be too much for an email, so I can best point you at the LVM HowTo. There are also some good lvm tips in the CentOS5 docs ( http://www.centos.org/docs/5/ ) OK this is what I have when I run mount - does it appear that I have both drives on one volume?:  /dev/mapper/VolGroup00-LogVol00 on / type ext3 (rw) proc on /proc type proc (rw) sysfs on /sys type sysfs (rw) devpts on /dev/pts type devpts (rw,gid=5,mode=620) /dev/sda1 on /boot type ext3 (rw) tmpfs on /dev/shm type tmpfs (rw) none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw) sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw) ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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Un Installing a hard drive in a Centos 5.1 box
by Pam Astor 16 Mar '08

16 Mar '08

Hi Guys, I'm fairly new to Linux and I'm trying to un install a hard drive from my Centos 5.1 box running KDE. When I built the PC, I installed two 500 gig maxtors in the tower, then I installed Centos. Now I've decided that I want to remove the slave drive and use it as an external backup drive - I am mounting it into one of those external drive cases with a built in fan. When I physically removed the drive and restarted the PC, centos would not boot up and went into a kernel panic. I'm sure I'm supposed to somehow unmount the thing before I do this, and that's my question - how do I un-install the hard drive - software wise - so that on next boot up, centos don't go crazy looking for it? ____________________________________________________________________________________ Be a better friend, newshound, and know-it-all with Yahoo! Mobile. Try it now. http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ

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Discuss March 2008