If there is a failed drive in RAID-1 running on Dell 2850, FreeBSD 5.4, can I just take out the failed drive and replace it with a new one, while the server is running? Will FreeBSD cope & rebuild the drive on the fly?
I have a Dell 2850 with 6 HD's:
2x36 GB in a RAID 1 with LD 0 of 36GB (the HD's changed to 1x72 & 1x144 and is working fine)
3x72 GB in a RAID 5 with LD 1 of 144GB
1x72 GB as a HotSpare
The 'problem/chalange' is as follows:
The LD 0 RAID 1 is getting too small (2x36GB seen as 36) for my Windows 2008 server C drive. So I changed one 36 GB disk for a 72GB and after a couple of days the other 36 GB to a 144 GB disk (because I had those two and not 2x72 GB or 2x144 GB). Everything is working fine in this RAID 1. But now I want to enlarge/expand de Logical Drive (LD no. 0) from 36 GB to 72 GB.
I only managed to make an extra (third) Logical Drive (LD no. 2 of 36 GB).
Now I do not know how to delete this extra LD 2 on RAID 1 AND how to expand the RAID 1 LD 0 into a LD of 72 GB.
The problem is that I do not know which option to choose in the RAID controller panel (ctrl+m during the bootup progres screen).
Who knows which buttons to press or a Windows based program to configure the RAID?
Will a Perc 5 raid card work in a non-dell Linux server? These cards can be found for about $100 on eBay, and are much cheaper than the Adaptec cards with similar features and ports.
View 5 Replies View RelatedOur DC is replacing our hard drive and doing an OS reload... how long should this take? Its been 60 minutes already, I was expecting it to take between 1-3 hours.
Can anyone fill me in on their previous experiences?
I have a couple of Dell 1950s and in one of them, I have 2x Seagate 15K.5s that I purchased through Dell and I also have a spare sitting in my rack in case one goes bad, also from Dell.
I was going to be repurposing one of my other 1950s and was going to get two more 15K.5s for it, but wasn't planning on getting them through Dell (rip off?). This way, could still keep the same spare drive around in case a drive went bad in that system as well.
When I was talking to my Dell rep recently when purchasing another system, their hardware tech said you can't use non-Dell drives with Dell drives in the same RAID array because of the different firmware between them.
Anyone know if it is true? Anyone have any experience with using drives from Dell in conjunction with the same model drives from a third party retailer?
I look after a Dell PE2800 server, it has a pair of 5.25 bays on the front, the top most of the two contains a Dell PowerVault 100T DAT72 tape backup drive. I have a second identical drive that i now wish to install into the bay beneath in a similar manner.
Problem is this - my colleague tell me that Dell are no longer selling the mounting brackets / rails needed to install the drive. I have had a fruitless look through the internet for a number of weeks now and hope that someone in the forum may be able to suggest a solution to the problem... anybody know a source for the brackets? Is there a parts site somewhere ive missed? Anyone happen to have what im after? Or any alternative suggestions?
We've got a couple of Dell SC440's that we use for low end stuff. We need one with RAID-1 so after talking with our Dell rep we ordered a 5iR card and the corresponding SATA cables. The cables are kind of funky in that the drive end of the cable has both the SATA and power connector in one "thing". You then plug the SATA power into the back of this (it piggy backs on). Once you have done all that the cover won't fit back on as the power connectors stick about 1/2" in beyond the case.
Anyone out there have a SC440 with RAID so we can compare notes?
We are planning on using FreeBSD's in-built mirroring to create a RAID disk. We've tested this with two drives, but they had different geometry and we think this is the reason that the second drive was unable to boot when connected alone instead of the first drive
If we get a server with 2 identical HDs, will this mean that the software RAID will make a full duplicate on the mirrored drive, including master boot record, partitions etc?
Dedicated server has 2 HDD but I am not going to pay another $25/month for the hardware RAID solution (already stretched too far).
My plan is to install FreeBSD 6 and use Gmirror to establish a raid-1 "soft" mirror.
Advantages: Entire drive is mirrored including the OS. Drives can be remotely inserted or removed from the mirror set using a console command so its possible to uncouple the mirror and perform software updates on a single drive then re-establish the mirror only after the updates have proved successful.
Disadvantages: Lower I/O than hardware solution (not a problem for me) others???
I rarely see people consider software raid for a tight-budget server and I am wondering why? Could it be that other OS's dont have a solution as good as gmirror? Or is it just that crappy soft-raid in the past has left a bitter taste in admins mouths? Or perhaps admins need the extra I/O of hardware?
We are limited with a maximum of 2 drives per server, with a maximum of 750gb drives.
We are thinking of going with 2 500gb hard drives. However the question is, should we use the Secondary drive with Raid 1 and let our VPS clients worry about their own backups or should we instead just use the secondary drive as a backup drive and backup each VPS nightly?
My raid 1 failed and it wouldn't be such an issue except that the other drive wasn't syncing for 2 months for some reason.
So now I have to try to recover it to get the info.
It seems that the drive seems to be ok yet I am unable to boot to it.
Using supergrub I was able to boot to a kernel but when it starts loading there is a kernel panic.
Error is basically
EXT3-fs: unable to read superblock
mount:error 22 mounting ext3
When I use Rescue option using a centos CD, I am unable to mount the HD.
Using Knoppix,I was able to see the HD but unable to mount it since it claims the 2nd partition is no clean. Since the HD was raid, I don't think thats the problem at all.
Is there anything you guys can advise me? I'm somewhat new to doing this and really green on Raid for that matter.
Whats a good method to find the superblock?
I am currently in the process of upgrading my web/mysql server due to heavy loads and io waits and have some questions. I am trying to be cost efficient but at the same time do not want to purchase something that will be either inadequate or difficult to upgrade in the future. I hope you can provide me with some guidance.
This server is a Centos Linux box, running both apache and mysql. The current usage on the box is:
Mysql Stats:
50 mysql queries per second
With a ratio of read to write of 2:1
Reads are about 65 MB per hour and writes are around 32 MB per hour.
Apache stats:
35 requests per sec
The two issues that I am unsure of are:
- Whether or not i should go with Raid-1 or Raid-5
- Whether or not I should use Sata Raptor drives or SAS drives.
In either configuration I will use a dedicated Raid controller. If I went with SATA, it would be a 3ware 9650SE-4LPML card. If I went with SAS, I was looking at the Adaptec 3405 controller.
Originally, I was going to use 3 x 74GB Seagate Cheetah 15.4K SAS drives in a Raid-5 config. After more reading, I learned that raid-5 has a high write overhead. Though read is definitely more important based on my stats, I don't want to lose performance in my writes either. With this in mind, I looked into doing Raid-1 instead.
I came up with these choices:
- Raid-1 - 2 x Seagate ST373455SS Seagate Cheetah 15K.5 SAS. HDs & controller costs are $940.
- Raid-1 - 2 x WD Raptor 74GB 10K SATA 150. HDs & controller costs are $652.
- Raid-5 - 3 x Seagate Cheetah 15K.4 ST336754SS 36.7GB. HDs & controller costs are $869.
- Raid-5 - 3 x WD Raptor 36GB 10K SATA 150. HDs & controller costs are $631.
As you can see we are not looking at huge differences in price, so I would be up for any of these options if I could just determine which would give me the best performance. I also know that I should have a 4th hotspare drive, but will buy that later down the road to ease cash flow in the beginning. If I went the SATA route, I would buy the 4th immediately.
From what I can tell, both configs provide the same redundancy, but are there any major performance considerations I should take? From what I have read, scsi/sas can enable database applications to perform better do to a lot of small and random reads and writes?
Which RAID level should I chose for an 8 drive setup? It is going to be a R1Soft server.
Should I get RAID 5, 6, 10, or a different level?
For a Vbulletin forum with up to 200 users online (only) but growing nicely and I want to be set for quite a while:
I am going to use Nginx, XCache, PHP-FPM, FreeBSD, Gzip
Currently using ~55 GB transfer with mod_deflate, all with dynamic traffic, little bits and pieces, no bigger files.
I want to be able to push 500 GB transfer or so this way, or ~ 1000 users online, many searches from non-registered users, too
I am looking at
Q9550, 8GB, 4x73 SAS 10k Raid-10, $200 Webnx
or
i7 920, 12GB, 4x73 SAS 15k Raid-10, $250 Webnx
or
X3220, 8GB, X25-E SSD Intel, $300 Softlayer
Am I too concerned about disk I/O? Should I save some money and settle for a 2xSATA Raid-1.
Databases are < 2GB and would fit into the RAM
I recently build a server with Asus M2N-MX SE motherboard and SuperMicro 14" mini 1u. On the back of the Asus M2N-MX SE manual. it said for RAID driver, i need to create it from the included CD and use a floppy disk. my question is how can i do it without a floppy disk? i have an external DVD-burner that i hook up to usb to install the OS. Is it possible to use a cd to install the driver when i press f6 during Windows2003 installation?
Is it worth the effort to setup RAID 1? I have two Maxtor 500GB SATA disks and using RAID 1 seem to reduce one disk and leave me with 500GB worth of space and is the onboard Nvidia RAID trust worthy? because it said due to chipset limitation, the SATA ports supported by the Nvidia chipset doesn't support Serial Optical disk drives (Serial ODD).
I've software RAID installed with one SATA and one ATA/IDE drive. It is a combined controller so I had to add noprobe=/dev/hdc to the kernel boot line. Now the disks are named /dev/sda and /dev/sdb. There are four partitions, /dev/sda1 and /dev/sdb1 are the /dev/md0 root partition and then /dev/sda2 and /dev/sdb2 are the swap partition.
First when I removed one drive I just came to the grub command line..
Then I tried to do this in grub to make both drives bootable:
grub>device (hd0) /dev/sda
grub>root (hd0,0)
grub>setup (hd0)
grub>device (hd1) /dev/sdb
grub>root (hd1,0)
grub>setup (hd1)
grub>quit
Now it looks like normal when I get to grub apart from that the background of the boot screen is black instead of blue and then the computer just restarts when it is supposed to start/boot the system.
If I use say two SAS 36gig 15k rpm drives 16mb cache - identical specs but different drive manufacturer's / models, do you guys think I would run into anything wierd? I've never really tried it. Is matching absolutely required? Never know..I doubt seek times different by a millisecond would cause issues but I just want to check.
View 4 Replies View RelatedPlanning to buy a server from softlayer, adding a single 300gb 15k scsi drive costs 100$/month and adding 4 250gb sata drives with raid-10 costs 90$/month
Which one would you pick up and why?
I have a dell POWER VAULT 725N utilizing a 4 HDD RAID 5 setup.
Server has died and bios error message shows that 2 hard drives had failed. I can not boot to windows.
Data is very crucial, what are my options for data recovery?
I really hope I can recover the data, I doubt that two HDD actually failed at the same time without giving any warnings. I hope its the raid controller.
Would like to hear pointers from the community on how to recover important data from the RAID.
Are there any companies/software that would help in this assuming it is a hdd failure and not a controller issue?
We had one of RAID controllers failed on our IBM RS/6000 server. There are two RAID controllers on this server, one holds the OS (AIX) and the other one holds our database and this is the one that failed.
Anyway, I've always thought that once a RAID controller failed and we put in a replacement controller, it will reformat all the hard drives that were connected to the failed controller, which means we would have to restore the data from backup once the new controller is in place. However, the IBM technician we dispatched was able to build the new controller and connect all the drives to the new controller without reformatting the drives. I think he copied the RAID controller's configurations using SMIT. I think that was amazing; it saved us a lot of time.
My question is, is this something unique to IBM hardware/AIX or other hardware and OSes (Linux, Windows, etc.) have similar capability?
I took two harddrives out of a windows 2003 server and imported them as foreign disks in my pc
the problem is... when i imported them as foreign disks, windows xp decided to mark every partition on both disks as failed... even though it hasn't failed.
Problem is now, i cant map to a drive... i need to do this so i can do an NT backup from the data off the drive, then restore that data to a new drive.
Here is what disk management looks like:
http://www.digitallyhosted.com/disk_management.gif
However when i look at it in Active Partition Recovery.... without running any recovery tools... it sees the data on all the drives fine:
http://www.digitallyhosted.com/partition_recovery.gif
Is there anyway to get windows to stop being a complete pain about this and just map the drive.
PowerEdge SC1435 Dual Core AMD Opteron® 2212; 2.0GHz,2X1MB Cache,1Ghz HyperTransport 143G20 [222-6400] 1
Operating System No Operating System NOOS [420-6320] 11
2nd Processor Single Processor Only 1P [311-3928] 2
Memory FREE UPGRADE! 2GB, 667MHz, 4x512MB Single Ranked DIMMs 2G4D6P [466-7879] 3
TCP/IP Offload Engine Enablement Broadcom® Dual Port TCP/IP Offload Engine Not Enabled NTOEKEY [430-1765] 6
PCI Riser Riser with 1 PCIe Slot PCIE [320-4982] 7
1st Hard Drive 80GB 7.2K RPM Serial ATA 3Gbps 3.5-in Cabled Hard Drive 80S2 [341-3801] 8
Primary Controller Onboard SATA Controller - No RAID OBSATA [430-1949] 9
Network Adapters On-Board Dual Port Gigabit Network Adapter, No TOE OBNIC [430-2008] 13
CD/DVD Drive No CD/DVD NOCDDVD [313-3924] 16
Bezel Bezel FRTBZL [313-4477] 17
System Documentation No Hard Copy Documentation, E-Docs ONLY and OpenManage CD Kit EDOCS [310-8261] 21
HD Configuration Onboard SATA, 1 Drive connected to Onboard SATA Controller - NO RAID MST1 [341-3957] 27
Chassis Configuration No Rack Rails Included NORAIL [341-3089] 28
Hardware Support Services 1Yr BASIC SUPPORT: 5x10 HW-Only, 5x10 NBD Onsite U1OS [980-9530][985-5117][985-9057] 29
Installation Support Services No Installation Assessment NOINSTL [900-9997] 32
Power Cords Power Cord, NEMA 5-15P to C14, 15 amp, wall plug, 10 feet / 3 meter WAL10FT [310-4450] 38
why do Dell's none dell rack rail cost $249? Can i buy the rail for dell from ebay? i saw a dell rail cost only $140 on ebay.
Quote:
Today we are going to conduct a detailed study of RAIDability of contemporary 400GB hard drives on a new level. We will take two "professional" drives from Seagate and Western Digital and four ordinary "desktop" drives for our investigation. The detailed performance analysis and some useful hints on building RAID arrays are in our new detailed article.
[url]
I have a Drupal install on my host and I'm wanting to use my free .co.nr domain as the main url but the site is located at a sub domain mysite.myhost.org. I want to be able to use mysite.co.nr but once I browse my site all link inside are mysite.myhost.org/something instead of mysite.co.nr/something
How do I go about change this? I don't have too much access to Apache or in depth settings so is it possible to do this through the htaccess? Something like changing the base url?
I have Squirrelmail installed on a VPS running CentOS with ControlZX as a control panel and I'd like to replace it with Roundcube. What I'm trying to do is make it so that the Roundcube webmail application is accessible through every domain on the VPS (e.g. domain1.com/webmail , domain23.com/webmail) without having to manually install it on every domain separately. Also, because I have resellers hosted on this VPS I don't want to just install Roundmail on our main domain and provide that as the official webmail access area because then our reseller's customers would have no choice but to access their webmail via our domain. For obvious reasons most resellers would prefer to keep their provider's presence in their own business transparent.
I know Roundcube supports "virtual users" and have a basic understanding of how that works, but I am unsure how setup Roundcube so that it can be accessed from any domain on the box. Where should I install it?
I've heard plenty of users talk about using Roundcube as a replacement to Squirrelmail so I have to assume it can be used in the way that I'm talking about (that is, not needing to be installed on every individual domain manually).
For those of you that have done this, can you please describe how you accomplished it?
I also don't have a problem hiring someone to help us complete this but am still interested in knowing how to go about it.
I am replacing the default certificate in Plesk so that customers do not get a certificate warning when visiting the panel login page.
I've created the certificate in the "SSL Certificates" section made it default and used it to secure Plesk. However I've still got all the existing domains using the old default certificate, how can I do a mass changeover so that all existing domains are now using the new certificate?
I've updated the IP's to use the new certificate. When I go to "SSL Certificates" in "Tools and Settings", it seems that there are some domains now using the new certificate but quite a lot of the other are still not, how can I get these over too?
I have a scheduled backup set on my panel, to backup all server configuration and content, and is set to run every week. I also set to keep only 1 backup on repository, but this config doesn't seem to work! My hard drive is getting full all the time, and when I check that its because theres a lot of old backups stored that are not getting removed!
My question is: the backup script removes the old files only at the end or it does it while backing up? If the action of removal happens only at the end of the script, i think it would explain why it isn't working: my hard drive gets full before, and the script drops an error, and never get to the end of it and it doesn't remove the old backups.
My Version: Parallels Plesk Panel v11.0.9_build20120609.17 os_Windows 2008
I want to try something different on our methods of replacing or upgrading hard drives.
I want to be able to do most of it via our KVM/IP instead of babysitting the server(s) for so long in the DC.
My thoughts are, how can I add the new hard drive in the DC, and move the data over via the KVM/IP. Can this be done with just a raw drive added (no new setup) using DD or even rsync, or is it better to setup a new installation of CentOS on the new drive, and use rsync to move the data over. Then how do I get the proper drive to boot until I go back into the DC to remove the bad or old drive? I'd be interested in how some of you folks are doing this, as far as what's easiest and could be done over the KVM/IP once the new drive is connected.
Or on systems that have 2 drives with cPanel/WHM, how can we temporarily on an emergency basis untilize the backup drive to do a new setup, copy the data over from the drive that is failing, then just replace the bad drive as a backup drive next time you go in the DC? We have an external USB CD in place to allow remote installs...just curious if anyone does something like this or has ideas how we could make this work.
We use cloning software now, but can end up babysitting a clone for a long period in the DC like this.
1- i did Os Reload with new Hard drive for "home"
2- data "backups" drive lost
3- replaced the old home drive as "/old drive"
4- " /old drive " is now the secondry drive in my server and it has the all sites usres and evry thing
5- what i need , to trasfer, copy this sites from " /old drive " to "home"
but data center said
The /olddrive/home directory contains the contents that were previously in the /home directory. You can copy files from this directory to any other directory on your server.
The command to copy files in the UNIX environment is the "cp" command.
The user directories in /olddrive/home directory contain the web page files for the users. However, simply copying the contents over will not recreate the users or domain entries in DNS/httpd. If you wish these back you will need to recreate them manually or restore them from backups.
