General :: How To Replace Hot Plug Disk In CentOS 5.4 With Dell Servers?
Aug 5, 2011
I am running a server in Dell which has RAID1 and hot plug 2 disks. It's been running for a while, but I was thinking it may crash anytime. So got a spare one, and wanted to test it how it works.I have never done this before. Can I simply, on a running machine, unplug the Disk 2 and connect the new Disk there? (Without interrupting the service as a silent mode?) Or does it have to be shutdown first, and unplugged, reinstalling all software/centos/etc etc? How do you do this update? Also how do you know when you replaced the disk? Do you have anything special to monitor that disk 1 or disk 2 is end of life?
We have 6 Dell r610 running CentOS 5.4 with stock kernels, with a couple of Broadcom NetExtreme II 5706c 1GB NICs in them. The NICs are flaking under load, and we'd like to try some alternative NICs (in additional to playing around with driver and firmware upgrades to see if the Netextreme II's can be made stable). Assuming we do not want to do bonding or TOE and just want basic solid transport, can anyone recommend a server NIC that is rock solid with CentOS 5.4? The goal is stable as source-able, we just want to get some baseline functionality up and running while we fight the broadcom issues.
I am running Ubuntu 8.04LTS x64 on a Dell Poweredge 1900 with a Perc 5i RAID Controller. There are 3 500Gb SAS drives in a RAID 5 configuration. The Kernel is Linux dtpfs 2.6.24-27-server #1 SMP Wed Jan 27 23:39:33 UTC 2010 x86_64 GNU/Linux Approximately once every 1 - 2 months I have a problem where the disk usage starts to rise for no apparent reason. When I run df the usage grows steadily over 2-3 days from 26% to 100%. At this point Samba reports that the disks are full. Baobab does not report the additional usage and the tape backup ignores the 'extra' usage and just backs up what was previously there. When I reboot the machine the usage is set back to normal and we can continue.
we have 22 servers Dell (20 Poweredge R210 + 2 Poweredge R310) with CentOS 5.5 x86_64 (kernel 2.6.18-194.26.1.el5). Half of these are on different rack. During the day, some server reboot without any reason and the messages log file had no evidence of what happened.
From /var/log/messages: ... Dec 8 14:10:02 hadoop011 snmpd[3029]: Received SNMP packet(s) from UDP: [172.27.1.21]:50825 Dec 8 14:10:02 hadoop011 snmpd[3029]: Connection from UDP: [172.27.1.21]:50825 Dec 8 14:15:26 hadoop011 syslogd 1.4.1: restart.
[Code].....
Some minutes after the reboot, messages log this error: Dec 8 14:18:14 hadoop011 Server Administrator: Instrumentation Service EventID: 1404 Memory device status is critical Memory device location: DIMM_A3 Possible memory module event cause:Multi bit error encountered.
Is it possible that 20% (circa) of 60 memory bank are broken? By the way, memory bank have Lifetime warranty from Kingston. If I reboot again the server affected by this error, the error disappear from messages log file and from OpenManage Web interface.
Is it possible that is a CentOS bug? I had search some relative bugs on Bugzilla but without any results.
I have a dell XPS m1530 which I think has an Intel wireless card (iw3945 i think). It's been giving me intermittent troubles since I bought it a few years ago, but never that bad.Recently it's been getting worse, and since ubuntu doesn't have the in-depth tools that windows vista did for resetting the wireless adaptor, it's been more trouble since switching.
I'm thinking of replacing the card altogether. I'd like to know if it's possible to remove and replace it for my laptop, and what kind of card would fit and work well with ubuntu.What would you guys recommend?PS- looking around the net it seems like this card has a lot of issues, is this just a badly made wireless card?
I have a couple of Centos servers, each connected to the Internet using its Static IP address. They are in the same physical rack. Is there a way I an get them to share a disk array. The disk array could be on one of the servers, or it could be separate SAN array.
My server is Centos 5.3 I have php 5.1.6. some of plug-ins does not work I have to upgrade it to 5.2.6. To upgrade it I have to install a third party repositories.How can I protect my current php in case if the repository does not work I enable ( or role back) the Centos default php?
I need to replace a disk from a veritas mirrored volume, I can not delete the disk from the diskgroup as the disk is using by other volumes in the same group. so, how can i remove the disk from my mirrored volume and can replace another disk.
After installing a Dell Optilex 280 desktop with Centos 5.4, I configured sendamil, squid and all the extras I needed for a proxy and email server. All was fine until I switched the machine off. I had changed the resolution before and all was working fine. Now I have lost my gui , the system starts O.K but goes blank after "starting udev". I can use webmin to administer the server from a nother desktop/laptop but the monitor is totally blank. I tried most configurations on the /etc/X11/xorg.conf file even tried to create a new one using X -configure but still nothing changed. I cant afford to reinstall because of the time it takes to update the box, our broadband connections are so expensive this end of the world (Zimbabwe) and not so efficient. I have looked at the logs and tried to google but the solutions wont work for me? I suspect there could be an issue with the intel graphics adapter?
i am looking to buy a new sata controller to add more disk space (ever not enougth) to my home server. My os is a CentOS 5.2 X86_64 with the xen kernel. I want a controller supported by the kernell, plug and store.I found two boards looking interesting with a cheap price:- Dawicontrol DC-4320 with a SiliconImage Sil3124-2.- Promise FastTrak TX2300.The DC-4320 is better because has 4 sata ports Vs 2 ports for the TX2300, but this is not a big problem for me because i only can add two more disk on my box.I, am planing to buy a 1,5 Tb seagate disk (ST31500341AS), dont know if it may be a problem with the size.
Firstly may I say I am new to this forum and apologise if someone else has already asked this question but I cant find it. I have a Dell 910 mini Inspiron 910 and like others keeep getting the disk useage warning. The disk is an 8mb flash disk. This has become full by updates and is a real pain. Q1 can you link an SD card to act as operating memory or is this just for storage? Q2 If not what is the cheapest and easiest way to upgrade the memory?
I'm new on Dell PowerEdge 2900. I dont know how to install centOS 5.2 on it. whice OS type that I should select. at first I select RH enterprise 5 and it format HDD. already and I put centOS 5.2 in, but it was deny and eject that cd. when I power off it shown that
"root(hd0,1)filesystem type is ext2f2,partition type0x83 kernel/linux/vmlinz%(ksLocations) Error is : file not found press any key to continue"
I have an SiI hardware SATA RAID card, with two 500GB disks in mirrored RAID configuration. When I first plugged them in and set it up, things seemed to work ok, but on boot the raid controller told me that the RAID needed rebuilding, and it would happen automatically after POST. So I didn't worry about it, and the drive mounted fine, and it's been that way for years. I just went in and manually on-line rebuilt the RAID in the controller's BIOS, and now when I boot into Ubuntu, both disks show up in fdisk, but neither show up in /dev/disk/by-uuid. Am I missing something?
how to Check the disk usage of different linux servers using df -h linux command. My host server is 66.50.100.1, I can check its disk usage by using df -h command. I got my disk usage. Now using my host server Im going to check the server 66.50.100.3 disk usage. Is its possible to check the disk usage of 66.50.100.3 using my host server?
I've done a bit of googling but have not been able to find a definitive answer. Can Samba4 replace the Active Directory on a Windows Server 2008 platform? I want to bring down my DC and replace it with a Samba4 server, but the AD is at 2008 level.
I am running centos 5. So far, it gives no problem but just yesterday, when it reported "no free space" for file writing, I try to remove some file as usual. Unfortunately this time no matter how much files I had deleted, it just keep showing no available space for doing so.
Result from df: [root@LSMSVR ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/VolGroup00-LogVol00 1.2G 269M 879M 24% / /dev/hda6 4.8G 138M 4.4G 4% /tmp /dev/hda5 19G 2.4G 16G 14% /usr /dev/hda3 48G 12G 34G 25% /var /dev/hda2 379G 365G 0 100% /home /dev/hda1 99M 15M 80M 16% /boot tmpfs 180M 0 180M 0% /dev/shm ow to recover the lost space in /home?
How can I mount an NTFS disk in CentOS 5.4? I did 'yum list | grep -i ntfs', but that doesn't show any ntfs rpms. Does CentOS support NTFS filesystems?
I am trying to get my head around my new server. I am using CENTOS 5.4 x86_64 with 300GB harddrive.
The 300 GB been partitioned with the following:
Device Size Used Available Percent Used Mount Point /dev/md0 99M 18M 77M 19% /boot /dev/md1 16G 8.7G 5.8G 61% / /dev/md2 246G 40G 194G 18% /home /dev/md3 4.8G 1.6G 3.0G 35% /var /usr/tmpDSK 3.9G 432M 3.3G 12% /tmp
I have increased teh tmpDSK as it was getting full very quickly. My question is, what are these md0; md1, md2 and md3 are they harddrive partitions and as md1 is getting full will that have an impact on my sites.
I've got a CentOS 5.4 box and the following disks connected: # parted /dev/sda print Model: ATA WDC WD1600BEKT-0 (scsi) Disk /dev/sda: 160GB Sector size (logical/physical): 512B/512B Partition Table: msdos
Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 160GB 160GB primary lvm
# parted /dev/sdb print Model: ATA WDC WD1200BEVT-0 (scsi) Disk /dev/sdb: 120GB Sector size (logical/physical): 512B/512B Partition Table: msdos
Number Start End Size Type File system Flags 1 32.3kB 107MB 107MB primary ext3 boot 2 107MB 120GB 120GB primary ext3 lvm the OS, data and programs are on /dev/sda.
I'd like to copy the full directories and files to the newly added /dev/sdb wich has, as you can see, less space. Also note that /dev/sda has only about 3.6Gigs uses, so it will no doubt easily go into /dev/sdb. How can I do the full copy, and yet make /dev/sdb bootable just like /dev/sda (just as if it was cloned by Ghost)? I've checked dd, but AFAIK, it needs that both source and target devices be the same in size.
There is a disk 500 gb, it is broken on /boot and on /root and on /dev/sda1 and /dev/sda2. Whether prompt it is possible to redistribute a disk without loss of data namely it is necessary to make/boot and two equivalent on disk volume.
Our company just bought faster hard drives for our webserver. A lot of the software and services set up on this machine have had config files set up, etc.. It would take a while to rebuild it from scratch, which i may have to do. I know most config files are in /etc and i can use apt to spit out a list of installed packages.
Any tips that i may want to know to avoid any gotchas here? We need to minimize downtime, of course, and get everything up like it is now.
This is my problem, I want to install debian 5.5 Lenny stable (2.6.26-2-amd64) on our new Dell PowerEdge T610 with a PERC controller H200 but nothing to do, the default Debian installer does not detect it. After more research, the module that I must load is "mpt2sas" and after normaly my hard-drive will be detected I'm going on the Dell site, there are only drivers for RedHat and Suze distribution .. I still try to install rpm packages but without success!
A couple of weeks ago, my 500 GB disk crashed after suffering an accelerating error rate for a couple of days.
Now that I have a new disk in place, I want to mount my old disk, which is (was) an LVM disk, as a second disk and recover files from it if possible.
The question is, how do I go about this?
If I mount the old disk:
# mount /dev/sdb1 /sdb1
the top-level directory shows only two subdirectories:
lost+found, which is empty; restored, which is an image of files recovered from old disk's predecessor.
'df' shows (or appears to show) that the disk is 11% full. Sorry, I don't recall how full the disk was before it crashed.
How do I get the system to recognize the LVM structure on the old disk & mount it?
Or is the directory structure too corrupted? Do I need to send the disk out to a recovery service?
P.S. Have aleady done some poking around with lvmdiskscan, which shows the old disk whether it's mounted or not, and vgchange -ay, which doesn't appear to do anything.
