CentOS 5 Hardware :: Partitioning Hard Drives With 4K Sectors (WD20EARS)?

Jun 10, 2010

would anyone here happen have gotten one of these successfully up, running &, aligned on 5.5? i only want two partitions. one 2gig for swap and the rest mounted @ /. i've googled myself into complete and utter confusion.[Moderator edit: changed the title to something more informative

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CentOS 5 Server :: Partitioning Hard On Hp Proliant Dl380 Doesn't Detect Hard Drive

Sep 11, 2010

I have been trying to install centos on my hp servers and when i get to partitions my hard drives the OS does not detect any harddrives. I have 4 scsi drives and i believe a intergrated smart array controller.

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Ubuntu :: Aligning A Wd20ears Hard Drive After The Fact?

Nov 13, 2010

After getting my components, building my computer, installing ubuntu and beginning to configure things I found out about the issues with aligning Western Digital's wd20ears 2TB hard drive. So I'm wondering what my options are. It's Maverick I've installed and when I go to the 'administration > disk utility' it reports a 1MB partition at the front, then 2TB partition for Ubuntu, then 25GB swap. Can/should I be worrying about this now? Am I too late to do anything except start over (remove old partitions and create new ones beginning in the right sector?) I read in this thread (this thread here) a post that made me hope perhaps I'm worrying about a non-issue but I don't know enough to diagnose things (or fix) myself...

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CentOS 5 Hardware :: How To Mount 2 Ntfs Hard Drives

Dec 11, 2010

How can I mount 2 NTFS hard drives, preferebaly automaticaly on startup. a GUI would be nice too.

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Ubuntu :: How To Fix A Hard Drive With Bad Sectors

Jan 20, 2010

I recently got a bad virus that wouldnt let me reinstall Windows so I figured I would install Ubuntu and give it a go, but now it says my hard drive has "many bad sectors" a quick Google search shows many ways to fix this in Windows, but how do I do it in Ubuntu?Easily since Im just getting the hang of things.

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General :: Centos 4.4 - 3 Of 4 Hard Drives Removed Now Won't Boot- Can't Find?

Jan 15, 2010

centos 4.4 - 3 of 4 hard drives removed now won't boot- can't find lv so kernel panic

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CentOS 5 Hardware :: Hard Drives - Creating "alternate" Boot Partitions And "alternate" Root File-systems On The New Drives

Aug 10, 2010

I have a Centos 5.5 system with 2* 250 gig sata physical drives, sda and sdb. Each drive has a linux raid boot partition and a Linux raid LVM partition. Both pairs of partitions are set up with raid 1 mirroring. I want to add more data capacity - and I propose to add a second pair of physical drives - this time 1.5 terabyte drives presumably sdc and sdd. I assume I can just plug in the new hardware - reboot the system and set up the new partitions, raid arrays and LVMs on the live system. My first question:

1) Is there any danger - that adding these drives to arbitrary sata ports on the motherboard will cause the re-enumeration of the "sdx" series in such a way that the system will get confused about where to find the existing raid components and/or the boot or root file-systems? If anyone can point me to a tutorial on how the enumeration of the "sdx" sequence works and how the system finds the raid arrays and root file-system at boot time

2) I intend to use the majority of the new raid array as an LVM "Data Volume" to isolate "data" from "system" files for backup and maintenance purposes. Is there any merit in creating "alternate" boot partitions and "alternate" root file-systems on the new drives so that the system can be backed up there periodically? The intent here is to boot from the newer partition in the event of a corruption or other failure of the current boot or root file-system. If this is a good idea - how would the system know where to find the root file-system if the original one gets corrupted. i.e. At boot time - how does the system know what root file-system to use and where to find it?

3) If I create new LVM /raid partitions on the new drives - should the new LVM be part of the same "volgroup" - or would it be better to make it a separate "volgroup"? What are the issues to consider in making that decision?

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Software :: Determine USB Hard Drive Capacity In Sectors?

Mar 24, 2011

How would one determine the capacity in sectors or LBAs of a USB Hard Drive? If I know the USB device number, like from 'lsusb', is there someplace on the system to get other information about the drive? What I want to do is have a program go out and get this information just for the number of LBAs on the drive itself. Partition info doesn't matter for what I am doing.

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Ubuntu :: Hard Drive Sectors Lead To A Really Sluggish System?

Jul 26, 2011

My sister's laptop (toshiba satellite l550 running lucid) often runs really, really slow, even after a fresh install. Going through the gnome main menu, everything just lags by several seconds. Closing applications often takes a while, etc. I've run top and iostat to determine what the problem is and it seems to be IO-related. User processes and system processes don't take up more than a few percent, but the average load is usually over 2 even when I'm barely doing anything. Top shows that, whenever everything slows down, the 'wait' criterion is pretty high.

Now, I've also tried installing lucid to an external USB hard drive and that works fine. I'm currently running the S.M.A.R.T. diagnostic and so far I've got the attached screenshot to show. Only the criterion shown and the 'current pending sector count' are showing warnings.Any thoughts? Could the performance issue be related to the hard drive warning? I'm not planning to replace the hard drive just yet, because this laptop still has a two-year warranty.

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Hardware :: Scan And Fix Bad Sectors On Hard Disk Without Damaging Data?

Dec 19, 2010

How to scan and fix Bad Sectors on Hard Disk without damaging data?

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Ubuntu :: Code To Access Hard Disk Sectors (LoopBack Device)

Jan 26, 2011

I'm kind of new to programming in Linux & c/c++. I'm currently writing a FileManager using Ubuntu Linux(10.10) for Learning Purposes. I've got started on this project by creating a loopback device to be used as my virtual hard disk. After creating the loop back hard disk and mounting it has the following configuration.

Code: $> sudo fdisk -l /dev/loop0
Disk /dev/loop0: 10 MB, 10977280 bytes
255 heads, 63 sectors/track, 1 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x00000000

Disk /dev/loop0 doesn't contain a valid partition table Now what I want to do is develop a c++ program to read & write files to this loop back device,which I'm using to simulate an actual hard disk,at the blocks & sectors level. So far I've come up with the following code. But I'm still unable to read files from the hard disk one block at a time.

Code: #include <iostream>
#include <stdio.h>
using namespace std;
int main() {
char block[512]; int length=0;
cout<<"Implementation of the File Handler Read Method..."<<endl;
FILE *f = fopen("/dev/loop0", "r");
if(f == NULL) {
cout<<"Error In Opening the HardDisk File Retuning Error..."<<endl; return -1; }
//Read One Block of Data to Buffer length = fread(block, 1, sizeof(block), f);
/* Do something with the data */ cout<<"Length : "<<length<<endl;
return 0; }

When I run this Program All what I get is the message for NULL. "Error In Opening the HardDisk File Retuning Error...". So I could open the loopback device as a file an access it at the sectors & block level.

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General :: Gnome Disk Utility Warned That Hard Drive Had Numerous Bad Sectors / Fix It?

Feb 21, 2010

I recently tried Fedora on my laptop (previously Debian; I was bored one day) and gnome-disk-utility (palimpsest) warned me that my hard drive had numerous bad sectors. I re-installed Debian to find that this software was installed before so why had it not warned me?

When I load the disk utility, it says SMART is not available. I've got smartmontools installed, I can run a self-test with smartctl but I don't think this shows bad sectors. I've tried starting smartd on startup but the disk utility never changes from "SMART is not available". It is possible for it to work with this hardware as it works in Fedora on this laptop; any ideas?

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Server :: 2 Separate External Hard Drives With ESata To Minimize An Electrical Failure To The Drives?

Mar 26, 2011

I am building a home server that will host a multitude of files; from mp3s to ebooks to FEA software and files. I don't know if RAID is the right thing for me. This server will have all the files that I have accumulated over the years and if the drive fails than I will be S.O.L. I have seen discussions where someone has RAID 1 setup but they don't have their drives internally (to the case), they bought 2 separate external hard drives with eSata to minimize an electrical failure to the drives. (I guess this is a good idea)I have also read about having one drive then using a second to rsync data every week. I planned on purchasing 2 enterprise hard drives of 500 MB to 1 GB but I don't have any experience with how I should handle my data

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Debian Configuration :: Partitioning The Four Individual Drives To Get Maximum Performance / Space From Them?

Jan 25, 2011

I've got 4 identical 1 TB drives and would like to use them in a software RAID configuration on my home server. I'm running Debian Linux using 'mdadm' utility to manage the software RAID. I don't know how much I've read is fact or dated or even false so I decided I would ask here to get help from people who know more about this than I do. This is essentially just a file server machine to store all my data so being that I've got four identical SATA hard drives, I was thinking about doing RAID level 5. I guess I'll start here and ask if that is the recommended level of RAID. I think RAID level 5 will be fine for my general server usage. My second issue is partitioning the four individual drives to get maximum performance / space from them. Basically just asking here how would you or you recommend I partition the drives? I was thinking about doing three seperate partitions per drive:

/dev/sda1 = 4 GB (swap)/dev/sda2 = 1 GB (/boot)/dev/sda3 = 995 GB (/Now from that partition schema above, obviously all the types will be 'fd' for RAID and the partition for /boot is going to be bootable. My confusion is that I read Grub doesn't support booting from RAID 5 since Grub can't handle disk assembly. If /dev/sdx2 (sda2, sdb2, sdc2, sdd2) are partitioned for /boot (bootable), how would you guys configure this RAID to match up equally? I don't think I do a RAID level 1 on 4 identical partitions, right?

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Fedora :: Can't Access Any Of The Other Hard Drives From The Other Drives?

Jul 5, 2011

I have Fedora 14 installed on my main internal drive. I have one Fedora 14 and one Fedora 15 installed on two separate USB drives.When I boot into any of these drives, I can't access any of the other hard drives from the other drivesll I can, but just the boot partitions.Is there any way of mounting the other partitions so I can access the information?---------- Post added at 12:42 PM ---------- Previous post was at 09:34 AM ----------I guess even an explanation on why I can't view them would be good too.

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CentOS 5 Hardware :: Smartd - Offline Uncorrectable Sectors?

Feb 14, 2011

I recently installed two 160Gb hdds, and use these with striped LVM technics.

now I came across /var/log/messages these lines... :-/
Feb 14 16:50:44 centos55 smartd[4826]: Device: /dev/sdf, 34 Offline uncorrectable sectors
Feb 14 16:50:44 centos55 smartd[4826]: Device: /dev/sdg, 14 Offline uncorrectable sectors

To my understanding, this means that the disk is beginning to fail, and should be replaced..

Short story..I have about 35.000 images on these disks... (shared on network, as a samba share with PCs using Picasa) I've doing backup to 2 separate USB disk, and sometimes I connect a third usb disk and transfer to this aswell. I'm worried now that "some" of my image/data might have been lost - due to the 2 lines above. (checking if something is missing, of the 35.000 images is not easy.. and I have not made any txt file with all files/names/size og the images -...I see now that I also should create such a list, and not just take backup)

How critical is this "Offline uncorrectable sectors" and how can I check/do something about it ?

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General :: Hard Drive Malfunctions When Other Hard Drives Are Connected?

Aug 23, 2010

I have a SATA drive that worked fine. Then I installed two more hard drives into my system. When these hard drives are installed, if I try to access the SATA drive in Linux, it will start lightly clicking and then the drive will become unavailable. If I power on the machine without the other two hard drives then it works fine. What could be causing this to happen? I don't think it's heat because the two hard drives are far away from the SATA drive.

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CentOS 5 Hardware :: 4k Sectors (Advanced Drive Format In WD Lingo) And RAID1

Dec 29, 2010

I have 2 WD20EARS hard drives on the way (2 TB green WD disks with 4k sectors) and I'll be installing Centos 5.5 in RAID1 on them (2 partitions, one 16 GB / at the beginning and the rest in its own partition). I read the following thread: [URL]

and it seems that I might be having problems with the 4k sectors (Advanced Drive Format in WD lingo). I'm confused as to what exactly to do. I was thinking of downloading Fedora 14 Live CD and partitioning there and then switching to Centos 5.5 to install. Will that work? Seems I want the md 0.9 metadata because it doesn't have the space limit for me (2 TB) and it's stored at the end of the partition so it avoids alignment issues. Will I be able to make that happen with Fedora 14?

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Fedora :: Partitioning Hard Drive With F14 Utility

Jun 28, 2011

I have installed Fedora 14 along with Libre Office along with some other applications so I am learning slowly, re-learning really. However I am having a difficult time understanding partitioning. I would like to make another partition for Windoze. I also cannot get a USB mouse to work. I have run some commands to gather disk info I will refrain from list it here as it is a lot of data. At least until asked to do so. What I have run so far is fdisk -l, df, blkid, & cat fstab.

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Red Hat / Fedora :: Partitioning External Hard Drive?

Oct 15, 2010

i have a 1 TB external hard drive and i have created 4 partitions as 3 of 300 GB , and one of 100 GB and i have format it as FAT but it is not showing 4th partitionand when i use fdisk -l it shows it as linux partitions and they are mounting in linux onlywhen i use the drive in windows , disk is not able to mount

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General :: Hard Drive Partitioning Vs Performance

Mar 3, 2011

if I make more partitions rather than creating single one, will I get more data access performance? E.g Instead of keeping 1,5TB partition, create 5x300MB and keep different data in different partitions? Logically hard drive will spend less time on finding data in smaller partition then in bigger one, right? Is there any statistics for performance vs size?

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General :: Formatting And Partitioning A Hard Drive For 10.10 As The Only OS

Jan 22, 2011

I have only known about Linux software for the past couple of weeks. I want to install Ubuntu 10.10 on an older desktop I have so I can become more familiar with it. I am average in knowladge about Windows OS and MS-DOS. I tried to install Ubuntu and I get an error message about the harddrive. The CD I am booting with will load on my other PC with Windows XP on it. I have only let it run on it long enough to verify that it is bootable.

I have made a floppy boot disc following the instructions on another Linux site about Ubuntu. I have also tried to boot my alternate PC with the floppy and it boots up. The harddrive on my working PC is a Maxtor 40gb formatted with NTFS file system. The harddrive in the older desktop is a Western Digital 80GB WD800LB-55DNA0.It worked fine with Windows XP on it. I also made a Western Digital DATA Lifeguard for DOS floppy and it boots with it.

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General :: MSDOS And GPT Partitioning In 1 Hard Disk?

Mar 8, 2011

I have a BIOS affected by 1024 cylinder limit ,,(Just to explain , the BIOS will recognize only 137GB no matter how big the HDD is (160/250/320/500))This problem doesnt affect the OS in any way --Linux can read the entire disk and so can WIN after SP1 of XP...This problem is only upto the point of MBR handing over boot instructions to Bootloader..In that case LiLo or Grub1 or Grub2 would fail if the kernel of the OS is after the 137GBI want to know if I can mix 2 partitioning schemes..Say use MSDOS partitioning till the limit of say 100 GB and for the rest 60 GB use GPT partitioning and install GRUB2 (as I read only GRUB2 supports GPT cleanly) ...Then , maybe I can do away with options of restricting /boot within 137

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Ubuntu :: Partitioning Around Broken Hard Drive Blocks?

Feb 15, 2010

It's pretty much as simple as that. I am simply wondering if anyone knows of a tutorial of some kind or can explain how to partition around, in order to exclude bad data blocks on a busted hard drive. This is on a computer I just set up to run Karmic Koala. On another forum someone mentioned that there is a way to do this, and that is the only way, to my knowledge to "fix" said hard drive.On a complete side note, does anyone know if an Intel 965 is supposed to work with Karmic out of the box, if you will? I haven't gotten a chance to check it specifically for this, and there seems to be no mention of this chipset with Karmic on these forums.

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Ubuntu Servers :: Partitioning A Mirrored Hard Drive

May 2, 2011

Have just installed Ubuntu Server 10.04 on a dell with a perc 700 raid card. Running a mirrored raid1 (2x 500G as one drive). All went well. Have installed a basic Gnome front end and Webmin. I want to partition the hard drive into system and data storage areas. What is the best way to do this with a mirrored RAID system?

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Ubuntu :: Partitioning Hard Drive After Using Full Disk?

Jun 22, 2011

create a partition seperate from my home directory out of it. i have a 500 gig hard drive and i wish to create a 70 gig partition on it on install i used entire disk is there any way to make a partition after this for i do not want to reinstall.

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CentOS 5 :: Newbie To CentOS Seeks Advice On New Install / Hardware / Partitioning

May 10, 2010

I've got a box (prev used for WinXP) with 2GB Ram and a new 500GB HD to throw in there.Noticed on the Wiki CreatingUpdateMedia and reading as much as I can ramping up for this.I'm curious how I should partition this disk, and what other decisions I'll need to make on install.I see quite a bit of interest also in virtualization, and if I find a need, this could be useful too.Kernel upgrades?how to do? Does the disk have to be wiped or just use an alternate boot device to replace K on HD? I have a tech background in programming and some solaris, but *nix has grown up in the last 5 years.Hopefully devices will function and networking connectivity can be acheived without too much troubleshooting.

I'm doing this in part to be more educated, especially in the new world of web-hosting where you have a virtualized box, root and shell access, and need to manage it yourself. Beyond that even, my goal is to be able to work on my web-host by setting up a remote linux desktop, and I'll be looking for ways to configure that. There are clients out there (VNC, etc), but I'm not sure on the host-server configuration, and also the port-forwarding setup on my local router.

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Debian :: Manually Partitioning And Formatting Large Hard Disk

Jan 5, 2016

What is the recommended method these days for command line partitioning and formatting for the Terabyte size hard disk.?

It was easy to keep up when your working or have access to hardware for re-purposing, but that has all dried up and my knowledge has been left behind. The problem(s) are with new, recent hardware

Following a crash from a now detectable faulty stick of RAMM, I've lost one of my data hard disks and my fiddling with replacement seems to leave various errors/warnings mainly about GPT not supported and this message is still present despite trying fdisk, cfdisk, gpart, gparted, and(?).

System is an ASUS mobo using SATA drives (root 500Gb: MBR+3 partitions;/, swap, /home), and two 2.4TB with single partitions.

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Ubuntu :: Format A Single Hard Drive - No Partitioning At The Moment?

Jul 21, 2010

how to format a single Ubuntu hard drive - no partinioning at the moment.

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Hardware :: General Partitioning Limits - Hard Drive Almost Full

Dec 5, 2009

My friend and I were discussing partitioning and we disagreed on repartitioning when the drive was full. How full is too full before partitioning will mess up your file system? I've partitioned before but it was only after the OS was installed, so only about %5 of the drive is being used. I read that 90% or more is too much. My friend claims it doesn't matter, and you can repartition even if the drive is 95%+ full.

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