Max or recommended LUNS per storage group

Similar Questions

• Adding a lun to multiple storage groups

  Is it OK to have the same LUNS in storage groups? I'll put up a new cluster and its own storage group. But I need to have other LUN mounted in the other cluster so that I can migrate virtual machines to this new cluster

  Fix. It's all basically just of masking.

• CX3-20: host in several storage groups?

  Hi all

  What is the trick? I have all the storage groups created on our SAN access to our server VCB (Virtual Consolidated Backup of VMware).

  The problem is that our Clarion EMC Cx3-20 allow us only to add a host to a storage group.

  If I want to connect the VCB server to a different storage group, I get a prompt saying (in Navisphere):
  AMS - back.corp.com: this host is already connected to a different storage group. Connection to the current storage group will be be disconnected from the other storage group. This will cause the host unable to access the LUNS that are in the other storage group.

  VCB server must see all LUNS, can advise you?
  Thank you

  
  

• Orientation of storage group

  Hi all

  We are expanding our storage environment and wanted some advice on setting up our group/pools.

  We currently consisting of 12 TB PS4000E storage group, it is used as mass storage for files and archiving of mail servers. All volumes are in the default storage pool.

  We bought a 24 CT PS4100E and a 14 TB PS6100X to add to this group. The idea is to migrate existing data from Vault/e-mail on the server of the PS4000E file, so it can be removed from the Group and used elsewhere in the company.

  In scenario 1 we add two devices in the Group and separate storage pools and migrating volumes from the storage pool by default for the pool containing the PS4100E. Then remove the PS4000E of the group.

  In scenario 2 we have the PS4100E and the PS6100X in the same pool of storage and migrate the data in the same way. The group can then distribute the data as seems it.

  In the future we will migrate VM storage over another group, containing a PS5000.

  What are the considerations of raid level and pool for these scenarios? RAID5 has been recommended for both of the new features, but can they coexist in the same pool and work well with the same level of raid?

  Thanks in advance.

  Jim

  Yes, you can run different RAID levels in the same pool and through different speeds with him when to use the latest version of the firmware (5.x and v6.x).

  You can add new members in any combination you like (an a R10 two R10 or the two R6, or alone as a R6).  APLB (Automatic Performance Load Balancing) will examine various aspects of i/o, disk speed, type, RAID and determine the best placement for the slices of volume and move the data according to the needs (in the background) to provide the best performance.

  Just note that because the SAS bays generally have more space, volumes have generally several sections on the largest capacity table.

  -joe

• Storage groups

  Hello

  At the start of SAN in UCS, what is the best practice when creating the storage groups in the drive Bay?

  For example, VMware: is it best practice to have a storage group for each ESXi and add its own ESXi Boot LUN (id = 0) and the necessary VM LUN data store?

  Other environments (Linnux, Windows, Hyoer-V) have something special in these terms to support?

  Thank you

  It's a security issue.  Because the LUN ID can be changed easily on the host computer, you could continuously clobber the LUN hurt if your server administrator has incorrectly changed LUN ID.  In addition, once a host is started, it will be able to see & access each LUNS in the storage group independently LUN ID.  The importance of the impacts host LUN ID matches only a host trying to start SAN.

  The two main forms of security applied to the storage is zoning and masking.

  Zoning - on storage switch, acts as an ACL restricting the scope of what can see the members of the zone.  An area will normally contain only a single host and target WWN.  * Who I can see *.

  Masking - on the table limits of storage 'what' LUN a host has access to.  This is done in the form of storage groups.  * What can I access *.

  Either work around poses a great risk to corruption or destruction of data given that different operating systems can be read their native file systems.  E.g. If you had all your hosts in a storage group (ESX, Windows etc.) and tried to separate them only by a LUN ID, a simple change of 1 digit of the start ID LUN on the initiator target could lead a crowd to not read the file system and potentially right a new signature to the risk - replace your existing data.  Windows cannot read a linux partition and vice versa.

  Follow these best practices and your data will be much more safe & secure.

  Kind regards

  Robert

• Volume App storage groups

  Has someone already implemented App Volumes storage groups?

  I've set up a group of storage with the following parameters:

  • Automation: "Appstacks of auto import" and "Automatic Appstacks replicate" active
  • Distribution strategy: left by default to "spread" that this only applies to writable volumes according to the documentation and I don't use the accessible volumes in writing
  • Storage of model: I chose here the LUN where my appstacks
  • Selection of storage: Direct
  • Storage: I chose here the LUN I want my appstacks to replicate to

  but nothing seems to happen.

  I'm doing something wrong?

  Looks like you selected only 1 storage location. You must select 1 more data store for replication to occur. Typically, you would select the data store that you create the appstacks on (the same data store that you used for the storage of model) and data 1 or more additional warehouses to replicate. So, using the direct selection of storage, you must have a minimum of 2 warehouses of verified data.

• LOW 5.0 API search Exchange storage group

  I had a problem to find the location of the storage group Exchange (2003 environment) within the API 5.0.  I have no problem to find the name of the actual exchange server however I do not know which class contains the value real homemdb (if any.)

  Any help is appreciated,

  Thank you

  Rob

  Hi Rob,

  The BES does not connect to any Exchange database so that there is no API to return this value. All communication is done via MAPI.

  A good rule of thumb, if something is not possible to be found/made using the console BOTTOM it is not supported in the BAA.

• Unit - mailbox moved to the new storage group is not available

  Hello

  I have a 4.0 (4) unit UM with a message from Exchange 2003 offbox store. During the initial installation, only the first storage group on the mail server was present and mailboxes of the users are hosted here.

  Recently, a new storage group was created on the mail server and a mailbox has been moved from the first group of storage to the new storage group. The Subscriber is able to receive voice messages via e-mail, however his MWI does not illuminate. When it tries to connect to retrieve messages on his phone, the unit said "your messages are not available now.

  I am able to create or import users that are hosted in the new storage group, but I'm having the same symptoms. Is it necessary to rerun the configuration of message store wizard?

  Thanks in advance.

  Have you run Assistant permission for the new Bank of mailboxes?

  The other thing to do is to restart the AvMsgStoreMonitor service; But wait after hours. A reboot will do the same.

• Replication storage group

  Just a quick question about automated replication.

  I noticed that, sometimes, a stack of app will be automatically repeated at all storage in a storage group, as soon as the stack is created. Maybe it's just a coincidence of timing. Other times, I have to use the button repeated in storage group menu, which I am reluctant to do it because I guess, he is everything that the replication (in the case where there may be changes).

  Is there a timetable? Can I force replication just to a single appstack, for example by using a command line on the server?

  Just for reference, we use only local flash storage on the hosts for the non-persistent linked clones, so we need to replicate to all the machines see the battery.

  the timing is every 4 hours and no its not configurable. You can force replication, but not for a single AppStack. However if there is that one added and you force a replication, it will only replicate a new a

• How to work on the strategy of Distribution of the storage group?

  Any body can help me to understand the strategy of Distribution of the storage group?

  The App, the storage Volumes have the option below:

  Spread: Distribute files in all storage locations.
  When a file is created, the storage with the most available space is selected.

  Round-robin: Distribute files sequentially using the storage locations.
  When a file is created, with the oldest time used storage is selected.

  I don't know what is different from this two option. When I select this option, I can see on my environment? Thank you.

  I think that it is used only for writable volumes right?

  If you are using storage with appstacks groups all appstacks are synchronized between the two storage when you use the sync option.

  When you create writeable volumes in the storage group it will create in one of the stores of data defined in the storage group.

  Let's say your staorage is called ST1, ST2, ST3 and ST4 and ST1 and 2 are 100GB and 3 and 4 are 1000GO then that's what happens.

  East Round Robin

  ST1, ST2, ST3, ST4, ST1, ST2, ST3, ST4 and so on and so forth. It would take into space wanted account.

  With the other he will do

  ST3, ST4, ST3, ST4, until both have also 100 GB of disk space and it will then be evenly.

• Question about maximum of Configuration - 256 LUNS per host,

  Hi all

  maximum rates of configration document 5 vpshere says:

  FibreChannel:

  LUNS per host: 256

  Number of paths to a LUN: 32

  Number of total paths on a server: 1024

  within a Cluster VM guests didn't see all LUNS, so it would be easy to hit those numbers.

  What I want to know is:

  When 1 disk is visible on paths (at least) 2 - How many LUNS must be counted?

  For as far as I understand, EMC Powerpath (I think - multi pathing VMware also does) presents only pseudo-device as usable LUN.

  I count:

  1 LUN - because only the pseudo-device is considered by the kernel?

  or

  2 LUN - LUN visible via 2-way?

  or

  MON 3 - 2 paths more pseudo-device?

  Thanks in advance

  1 disk accessed by multiple path is considered to be a LUN

• LUN and storage Partitions

  When you use the IBM DS4700 SAN and if ESX supports only one active path to a logic unit at a time number - if I have a logic of Production and an another LUN of Test unit number, I'd rather create a partion of storage for each, then ask SAN CTRL A - & gt; path preferred on Production LUN SAN CTRL B - & gt; the path preferred to LUN of Test? the attached picture shows how I have two paths each HBA, FC switch and SAN. I would like to optimize traffice as much as possible. Any suggestions?

  Thank you

  Am I right assuming that I would be better for the performance of each logic unit on a separte storage partition number and each controller

  Altogether.

  For each RAID Group (or group of physical disks), only 1 LUN.

  At least 2 LUNS.

  If possible (if you have 4 way and many records) also consider using 4 LUNs.

  Rember that each logic unit number must be<>

  André

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• Single controller RAID, LUNs, virtual disk groups question does?

  Hi VMware Experts.

  I have 5 servers (each at full load with local SSDS 8 x 1 TB).

  I'm curious:

  1. If I configure raid 5 (I'll have 6 TB per host), how many LUNS / data warehouses should create? Is it important here? In any case, we still have controller raid just unique, right?
  2. If I use VSANS, is there a difference in the answer above? A data store for each host is probably correct? Or because the VSAN configuration: raid0 /passthrough better to create several data warehouses/LUN?
  3. Insights into the performance here?

  Thank you!

  1. Yes, it is ok, because you have no other choice.

  2. you can't do several stores data vsan. A single vsan by cluster data store is possible.

  No matter how many ssd\hdd for each host that you have.

• Criando LUN em storage DAS para uma VM.

  Amigos,

  E.r. comprar um novo servidor para an empresa e o mesmo um servidor VMware ESX 3.5 will, este servidor e.r. criar uma VM that Modica armazenada em um DAS Storage, o MD3000 da Dell, VM esta um servidor will change Server. Some amigos don't do Technet aconselham as nao leave a base Exchange armazenada dentro do virtual disk dados da experiencia VM, aconselham one each separate discos no storage, criar um array e uma MON e atrelar esta LUN a virtual machine.

  Pergunto, como para fazer uma VM uma storage LUN enxergar CFFO e assim como add to ditch um segundo disco message?

  A virtual machine, Windows Server2008 wont, one tera tera Plaça SAS listada no Device Manager? Esta placa SAS e a mesma usada pelo para armazenar ESX host a virtual Exchange como also computer other 03 VMS than serao instaladas.

  So lembrando as neste storage e.r. urban 04 discos e criar um LUN price, para esta VM Exchange.

  Desde ja Agradea§o as tips e aguardo.

  SDS,

  Ivanildo Galvão

  MCP - MCT - MCSA

  E EU had understood that vc queria deixar as bases Chenge em uma lun not para paresentada of storage a VM e nao para o ESX.

  Certo e ter a Máquina virtual com o Exchange installed inside storage, or seja, a logical unit number presented para o ESX. HERE we have um ambiente legal sim.

  O ter of sequence vc falo base em outra lun realmente e truth, e bom deixar maquinas para do muito IO em LUN lines para elas, POI cara lun vai usar um way back existing only to comicar com o storage, e is existirem many vms na mesma lun, vai divertir essa concorrência.

  Julio,

  www.TELETEX.com.br

  ______

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• VMFS partition alignment and recommendation of the storage provider

  In the literature of my storage provider it says they use a band of 256 KB size, and it's a good approach to set the offset to 256 KB (or 512 sectors) when creating VMFS volumes.

  "When you use the VI Client, the new partition is automatically set to an offset of 128 sectors = 64 k." But,
  in fact, this configuration is not ideal when you are using the DS8000 storage disk. Because the
  DS8000 uses more large block sizes, the offset must be set to at least the size of the stripe. For
  RAID 5 and RAID 10 in the attachments of open systems, the allocation size is 256 KB, and it's a good
  approach to set the offset to 256 KB (or 512 sectors). You can configure individual compensation
  that from the ESX/ESXi server command line. »

  I'm guessing that they always use the old VMFS3 information above?

  Now with vSphere 5.x and VMFS5 the offset is to the sector 2048 (or 1024KB)

  Question is if I go with vSphere 5.x VMFS5 and create the volume VMFS via vCenter VI Client will be I'm always perfectly aligned with my storage or should I still manually create VMFS volumes with starting with sector 512 (256 KB)?

  Thank you for your answers!

  1 024 KB alignment is a multiple of many sizes of block by default if it guarantees a correct alignment for all types of storage where the result of 1024 / 'stripe size' is an integer value.

  André