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[ubuntu] WDC Advanced format drives and MDADM question

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http://ubuntuforums.org – Hi all, I've got a little file/web server box that runs Ubuntu 12.04 64 bit server with five 2TB Western Digital hard drives. The drives are the "Advanced format" type (i.e. 512/4096 byte sectors). Now, my setup is a RAID-6 array (/dev/md0) made up of /dev/sda thru /dev/sde. The hard drives have NO partitions. The RAID array is assembled out of /dev/sda etc.... NOT /dev/sda1 etc.... If I check the /dev/md0 array with parted, it shows that the array starts at byte 0 (I did a u b [units/byte] command). Since the drives are not partitioned, I am assuming that access to them starts (Hardware)

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Submitted by dayu on 07/08/2012 – Made popular on 07/08/2012

Stories similar to [ubuntu] WDC Advanced format drives and MDADM question

A while back I created a RAID 6 array consisting of 5 2TB drives and formatted it with XFS and set up the block and stripe size appropriately.

Yesterday I added two more 2TB drives to the array and it is almost done reshaping the array. While running that I realized that XFS is optimized for the number of drives, and so far as I can tell there is no way to change that after the fact.

Hi all,

I tried to upgrade my file server box running 11.04 64 bit server with 5 drives in a array to 11.10 server.

Now, my RAID array is /dev/md0 and composed of 5 drives with no partitions. That is, I created the array, formatted /dev/md0 with EXT4 and that's it.

I asked this on askubuntu.com as well but since it's a server question, figured I'd throw it on SF, too.

Haven't run into this situation before but it seems simple enough. Looking for advice/guidance on the following issue.

I have an Ubuntu 11.10 64-bit server that is configured with 2 identical hard drives in a RAID-1 through the mdadm utility.

I have a raid array of hard drives in a Sun x4600 that need to be moved out, and another Sun x4600 ready to accept those hard drives.

The problem is: in my limited experience with servers, it seems like hard drives added to a server always get wiped by the raid controller because the controller insists on "initializing" drives before recognizing them as a raid array.

Yes, I have backups.

Is it

After a restart which stalled, I did a hard reboot and now mdadm can't see the RAID 6 array anymore, LVM can't find the volume which was on that raid array.

Haven't run into this situation before but it seems simple enough. Looking for advice/guidance on the following issue.

I have an Ubuntu 11.10 64-bit server that is configured with 2 identical hard drives in a RAID-1 through the mdadm utility. It's a simple LAMP server that runs a few projects I'm working on but is growing out of the current storage.

[ubuntu] mdadm RAID0 Issues 25 weeks 24 min ago

Hello, i am very new to Ubuntu. I have a 60Gig SSD running 10.04 and two 2TB HD in a RAID0 array using mdadm. I found a guide to setup the array and its working great.. for a while. Seems like every other day i have to restart my server because the 4TB RAID array will only show 5% of the data that is on the drives. Once i restart, the array shows 100% of the data on the drives.

I'm using a Supermicro X9SRE-3F motherboard with the latest BIOS and 2x 4TB drives connected to the on-board SATA controller.

If I set the BIOS to RAID and create a RAID 1 array, the array shows up in the BIOS as 3.6TB.

I have the following drives:

Seagate Barracuda ST3200054AS WDC WD20EADS-00S2B0 Samsung HD204UI

As far as I understand, the first are ordinary 512 drives while the last is 4096 (Advanced format).