RAID6

Similar Questions

• Two spare RAID6 and EQL

  Hello

  When you configure an EQL to RAID6 array, it selects a hard drive as a hot spare. Now: Is it possible to use two drives hot spares?

  Best regards
  Joerg

  Hello

  Sorry, it's not.

• The raid5 to raid6 upgrade

  Hi, I have a 12 x disc 1 to md3200i with this layout:

  11 disk forming a raid5 with a hot spare.

  I've been advised that raid5 with 11 discs is not a good idea, because of the high probability of failure during the reconstruction, so I ask: is it possible to change the configuration of a with the spare drive raid6 without messing up the data?

  It is possible online?

  I wouldn't mind not having a spare drive if I can survive 2 disk failures.

  Hello Zoid,

  Yes, you can change the raid level with the help of your extra disk.  You can also do online as well.  I'd also sure you have a backup before you start, just in case anything should happen that you can restore your data.

  Please let us know if you have any other questions.

• Can I extend my MD1200 RAID6 configuration?

  Hi all

  I have a PERC H800 and MD1200 RAID6 would be on a PE on Windows Server 2008 R2 x 64 2970.  Currently I have 8 disks SAS of 2 TB, but 4 locations open and would like to extend.  Is it as simple as the addition of 4 disks? After saving the data, of course...  Any help appreciated.

  You will need to do is install Open Server to manage the server administrator. Which may require a reboot. Then put the new HDD and inside the OMSA you can go to the virtual disk and select this option to reconfigure. It will allow you to select the new drives to add to the VFD. Once this process is complete, you will need to use a utility such as diskpart to actually extend partition on windows. Also, as you mentioned, it is essential to ensure that you make a backup prior to this process, just to be sure. Please let me know if you have other questions I would be happy to help you.

• PERC H700 reconfigure RAID5 to RAID6

  We currently have a Dell PowerEdge R610 (PERC H700 embedded controller) with SAS 6 x 300 GB disks in a RAID5 configuration. We want to replace it with 6 x 1 TB drives in a RAID6 configuration. We must do so with as little downtime as possible (preferably no). Is it possible to Exchange each small disc out with the largest disk and perform a direct reconfiguration of 5 + 1 RAID5 to RAID6 4 + 2 configuration?

  States of the documentation you need to add a new disk to reconfigure from RAID5 to RAID6 RAID6 for a smaller virtual drive, but given that the new drives are much larger, it should theoretically be possible to reconfigure without adding a new drive all in maintaining / increasing capacity. If the controller supports that is my question.

  1. you cannot mix SAS and SATA drives in the same array, to replace a 300 GB SAS drive with a 1 to SATA will NOT work.

  2. IF you were to replace the 300 GB SAS drives with 1 TB SAS drives, you might reconfigure your table to include all of the space on the disks, however...

  3 If you reconfigure your 1.5 to 5 to VD VD, you MUST have already installed the operating system in UEFI boot mode. If you currently have your system in the BIOS boot mode, you should be limited to a 2 TB VD or need to reinstall the OS using the UEFI.

  4 reconfiguration of a 6-disk RAID 5, RAID 6 requires the addition of a 7 disk, regardless of the involved disk space.

• Openfiler as NAS for ESXi shows the performance difference between software RAID6 and RAID10.

  I had some performance issues with a new ESXi server with virtual machines hosted on a table of 6 software RAID (12 units of optical fiber). Here's what it looked like:

  12 multi-plate (RAID 6) -fiber channel- Openfiler.

  ---

  NFS - VMWare ESXi

  Since I had a spare CF array I decided to fix to the Openfiler box and try to RAID 10 in software. Different performances has been staggering. I did a lot of steps, but I test the startup time of a computer virtual stored on each table of FreeBSD.

  RAID 6 59 seconds

  RAID 10 45 seconds

  Now waiting for MBR of FreeBSD for 5 seconds and the boot loader expects 10, so there were at least 15 seconds of downtime in each case. The strange thing is that accessing directly the matrix RAID 6 via FTP provided good performance. I was able to saturate a 100Mbit link and the Openfiler Server showed almost no load. But with the VM on the RAID 6 array, the load on the Openfiler area would jump to 4 +. I hope it helps someone.

  Jason M.

  It's better.  What system and mount underlying file options are used?

  http://blog.peacon.co.UK

  Please give points for any helpful answer.

  Unofficial list of transfer USB devices work

• Maximum storage capacity for RN316

  I know there are other topics covering this, but not for the model, I am interested to. I notice conflicting information on what maximum storage capacity, are supported by the RN316. For example, looking at the Datasheet on the Netgear product site, it shows the RN316 supports up to 60 TB and is expandable up to 128 TB with external units.

  https://www.NETGEAR.com/home/products/connected-storage/RN316.aspx#tab-TechSpecs

  Here, the graph shows however differently (hoping it is exceeded). According to this, the same model only supports 24 TB of max and is expandable up to 64 TB with external units.

  http://KB.NETGEAR.com/app/answers/detail/A_ID/7010/~/ReadyNAS%3A-expansion?CID=wmt_netgear_organic

  In addition, said Amazon list it has a limit of 4 TB of each Bay, but hard drive compatibility shows that it supports 8 to even 6-disc (including TB WD drives Red 6 I ordered). So I'm a bit confused.

  Are the limits of capacity related to older hardware, or is it something that is been upgraded over time through updates firmware for the ReadyNAS OS 6? I bought six to 6-disc for my RN316 and intend to use RAID6 - up to 36 TB of physical capacity and capability real/loglcal to 24. Can anyone confirm if this configuration would be supported by this model? Thank you

  When the RN316 came out 6 TB discs were not available. Once we were able to test and qualify the and add all the necessary improvements to the firmware works well with them, we were able to add 6 to discs to the compatibility list.

  10 TB disks start to become available now. Regarding which models will be tested against this ability or to work with, it remains to be seen.

• btrfs_merge_bio_hook + a0 error, recovery possible?

  Hello

  I have a ReadyNAS 204 with btrfs_merge_bio_hook + a0 error. After reboot I can't ssh into the box, but the web interface does not load and the data volume is not mounted.

  Output of cat/proc/mdstat:

  md127: active raid5 sda3 SDS3 [0] [3] sdc3 sdb3 it [2] [1]
  
        11706506496 blocks super 1.2 level 5, 64 k chunk, algorithm 2 [4/4] [UUUU]
  
  Raid6 MD1: active sdd2 sda2 [0] [3] sdc2 sdb2 [2] [1]
  
        1047424 blocks super 1.2 level 6, 64 k chunk, algorithm 2 [4/4] [UUUU]
  md0: active raid1 sda1 sdd1 [0] [3] sdc1 sdb1 [2] [1]
  
        4190208 blocks super 1.2 [4/4] [UUUU]
  

  Output of btrfs fi see the:

  Label: ' 1165568a: Volume1 "  uuid: 56990628-d1ea-4142-8c3d-5dd32b620f00
  
          Total devices 1 FS used bytes 8.30TiB
  
          DFR    1 size 10.90TiB used 8.35TiB path/dev/md127
  
  Btrfs-progs v4.1.2

  It is possible that the distribution of volume has exceeded 85%. I didn't know that it can lead to errors. Is there a chance to find the volume, or is set to zero with my only option?

  Finally I used - path access-regex to restore specific directories, and it worked fine. Seems that everything I wanted has been copied.

• PowerEdge Raid700 in RD540 with ESXi Thinkserver

  Hello

  I'll put up a hypverisor 5.5 ESXi update 2 on a lenovo RD540. There is a RAID700 controller.

  I use 3 HARD drive in a RAID6 configured with the tool of the bios (Mega RAID LSI)

  The server works fine, but I don't see the healthy of the RAID on the ESXi.

  I don't see the virtual disk, not the adapter of storage or physical disks. If one lose a disc ESXi does not know, I hear only the PIF from the server.

  How can I solve this problem?

  If I use the "Lenovo easy start' to install ESXi RAID adapter will be with ESXi?

  Thank you in advance.

  Concerning

  Arnaud

  Right now, I'm on the WebBios and I can't find where I can configure it

• on windows 2003 (GPT disk) backup issues

  The system is Windows Server 2003 R2.
  We have a storage device for data that are using RAID6 configuration.
  Recently we have expanded the capacity of the HARD disk.  Before the upgrade, each hard drive was 1 t, whereas it is 2 t after the upgrade.
  Type of drive HARD precedent is the MBR (Master boot record), the NTBackup was fine.
  After the upgrade, we have changed the type of disk to GPT (GUID Partition Table).
  But a problem occurs. The NTBackup does not work.  Error massage parlours: waiting to retry cliché.
  NTBackup supports the GPT disk?
  Everyone kindly give some suggestions to solve this problem of backup?
  Thank you.

  Ask in the forum Windows Server:
  http://social.technet.Microsoft.com/forums/en-us/category/WindowsServer

• MD3220 and hyper-v CSV

  Hi all

  I'm trying to find information on the use of a MD3220 and 2012 Windows to create a node Hyper-v cluster to 4. According to the documentation that I realized I should be able to connect 4 knots, with redundant paths, to the MD3220 and allow all 4 to the same LUN host access.

  I intend to have a single disk RAID6 group mapped on all hosts.

  Then, I intend to configure each Hyper-v host with the LUN MD3220 presented as a CSV file.

  Is this valid/taken configuration supported? Are there guidelines to setup for this configuration?

  Hello jhodges8,

  Yes the configuration that you are trying to install will be supported because it meets the system requirements.  What I would do, is to add the Lun to a server within the Group and then add other servers, one by one.  Once you have all added systems so you can go the cluster installation.

  Please let us know if you have any other questions.

• Space in use SAN HQ alert 4.2 on volume

  I've recently been reconfiguration of EQL (1 PS6100, 1 PS4000) customers.  As part of the cleaning and modernization of the former ESXi environment, virtual machines were vMotioned storage of 4000 to 6100 and the4000 reset, reconfigured and added to the 'new' group began with the PS6100.

  The PS6100 is RAID10 and in its own pool of storage, the PS4000 RAID6 and in its own pool of storage.  The PS6100 has a single TB 5.5 thin provisioned volume (total available is 5.75 to), the reconfigured PS4000 has a single 4TB thin volume (total available East of 5.66 to).

  About halfway through to storage quick vMotioning of PS4000 to PS6100 VMS, SANHQ began reports 4.2 warnings of space on the volume of same PS61000 if running in Workgroup Manager of space in use for the volume and the pool was only about 2 TB with him remains marked free.  Once the PS4000 has been revamped and its created volume and about 1.1 to migrate back, this volume has begun to take a 4.2 errors as well.

  SanHQ reports 4.2 errors, the two volumes now that more than 99% complete, even if the Group Manager shows as much less complete volumes - the PS6100 is about 70% full, the PS4000 only 30% full (volume, pool is only 20% full).

  My understanding of thin volumes with VMware is that they grow only represented by how much space has been consumed by the upstream file system (for example, VMware VMFS) and "shrink" only if manually unmap you them (VMware) or run another operating system that automatically cancel the mapping.

  That being the case, none of my thin LUN EQL never showed more than 70 percent use of space (maximum) and some never more than 25% maximum, than even San HQ throws 4.2 errors.   Why?

  Hello

  It is a known issue with SANHQ v3.1.   The next version should exit this month this will resolve this error.  There are several other threads here discuss this issue.  For now, turn off the alerts is best work around.

  Kind regards

  Don

• Remove the Member from the pool shared with 3 members EqualLogic

  Hello

  I think that my last post was not able to download.

  How can I remove an EQL Member that went wrong in the shared pool?

  EQL all run raid6 and there is enough free storage to remove the bad device.

  (Bad) PS4000, PS4100 and PS6000

  Hello

  Is the table online or the poster in offline mode in the GUI?    If online, you can use the delete member option in the GUI.  This will move the data to the other members.

  What is the problem with the PS4000?

  Kind regards

  Don

• PS6210X with 24 1.2 TB in RAID 50 SAS drives, how RAID 5 sets?

  We have a PS610X with 24 discs of 1.2 TB SAS (10,000 rpm, model HUC101212CSS600).

  The unit is currently configured in RAID 50 and has two parts. How RAID 5 sets are configured in fact? Is - this 2 x 11 or 2 x 6 + 2 x 5 or something else?

  Is it still considered safe to perform this configuration in RAID 50, or are we better off the coast of conversion to RAID 6?

  Hello

  The 6210 X creates two RAIDsets.

  The suggestion of using RAID6 is 7200 TPM NL - SAS become increasingly large, rebuild times are multiplying so.  That widens the window of vulnerability for a double error condition is another drive that RAIDset must fail.   However, with disks SAS 10 K / 15 K being so much smaller that window is still a bit small.

  That a lot depends on your needs.  I prefer R6 on R50 with a 6210 especially since there support the unloading for the calculation of parity.  To reduce the overhead costs of double parity.

  Good thing is that you can convert into R6 at any time of the R50.

  If you have installed SANHQ you can review your load, then use the RAID evaluator to see if R6 will always be you provide write IOPS / s you need.

  Kind regards

  Don

• EqualLogic PS6000s in a group hybrid

  Hi all

  We have 2 PS6000 without. An SSD and a SATA.

  With the new firmware (V7.1.2) we understand that the creation of a group, and identify as such SSD table, it was supposed to perform in the form of a table of the hybrid. The group does not appear when you run as expected and the e/s is higher on rotating disks on the SSD (seems backwards).

  Can someone confirm this for me? I'm not find documents confirming the he...

  Any help would be greatly appreciated, perhaps there is a configuration setting that you miss? There may be a configuration there guide I'm not find?

  Thanks in advance for any help.

  Mark

  Hi Mark,

  Yes, sorry, it was supposed to be 'impossible '.

  A 'Hybrid' 6000 model cannot SSD + SAS drives in the SAME chassis.  A small set of disks SSD and balance SAS drives.  The only available RAID option is "accelerated RAID6.   It is this level that offers the advantage of this combination.   RAID levels do not in the Member States in a pool.  Each Member has it's own RAIDsets.  Data in a pool are distributed to members in the same pool.

  Kind regards

  Don