two flash disks in a single disk group vsan

Similar Questions

• Combine the free capacity of different disk group

  Hello

  I have Dell PowerVault MD 3000i. I have the free capacity of two different disk groups. Two groups of disks have the same RAID level. Is it possible to combine the free capacity of these two groups?

  Thank you.

  No, this isn't an option. Your only choice is to make 2 different virtual disks.

  In the operating system, you can be then able to combine them, but this has usually few drawbacks with respect to performance and reliability.

• I'm trying to restore my win7 with HP USB recovery Flash Disk, I get the following two messages

  I'm trying to restore my win7 with HP USB recovery Flash Disk, I get the following two messages:

  "Do not create C:\Users\User\AppData\Local\Temp; c:\arc\01Script\FormatUFD.SP' and the messsage "Fail to create.

  How to port HP_recovery in car to my flash drive?

  Windows 7 x 64, HP G62-144DX

  Hello:

  I can't help you with this specific issue, but if you can get it is resolved and you can read the product key 25 character Microsoft Windows on the bottom of your PC, do your own installation of W7 media to reinstall W7.

  Here's how:

  If you can read the Microsoft windows 7 25-character product key, you can download simple Windows 7 ISO files to burn on a DVD for the version of windows that is installed on your PC, and which is listed on the Microsoft COA sticker on your PC case.

  Burn the ISO with the option to burn the ISO on your DVD burning program and burn it at the slowest possible speed that will allow your program. This will create a bootable DVD.

  Or use the installation of Windows 7 USB/DVD tool to compile the ISO file that you download from Digital River. Link and instructions below. You need a 4 GB flash drive to use the USB compilation method.

  http://www.microsoftstore.com/store/msstore/HTML/pbPage.Help_Win7_usbdvd_dwnTool

  Use 25 characters on the PC product key to activate the installation.

  The key will activate a 32 or 64 bit installation.

  Then go to the support of the PC and driver page to install the drivers you need.

  Link to downloads ISO of W7 is below.

  http://www.mydigitallife.info/official-Windows-7-SP1-ISO-from-Digital-River/

  Paul

• Disk groups are not visible cluster. vSAN datastore exists. 2 guests (on 8) cluster do not see the vSAN data store. Their storage is not recognized.

  http://i.imgur.com/pqAXtFl.PNG

  http://i.imgur.com/BnztaDD.PNG

  Do not know how even tear it down and rebuild it if the disk groups are not visible. The discs are in good health on each host storage adapters.

  Currently the latest version of vCenter 5.5. Hosts running 5.5 build 2068190

  Just built. Happy to demolish and rebuild. Just do not know why it is not visible on the two hosts and the disk groups are only recognized 3 guests when more are contributing. Also strange that I can't get the disk groups to fill in vCenter. I tried two different browsers (chrome and IE).

  I have now works.

  All the identical 5.5 relies on ESXi hosts. All hosts are homogeneous CPU/sum of the prospects for disk controller / installed RAM/storage.

  I have work. I had to manually destroy all traces of the vSAN on each single to help host node:

  (1) put the hosts in maintenance mode and remove the cluster. I was unable to disable vSAN in the cluster, I made on each node host (manually via the CLI below) then disconnected web client vCenter and return to finally refresh the ability to disable on the cluster.

  esxcli vsan cluster get - to check the status of each host.

  esxcli vsan cluster drop - the vSAN cluster host.

  storage of vsan esxcli list - view records in the individual host group

  esxcli vsan storage remove-d naa.id_of_magnetic_disks_here - to remove each of the disks in the disk group (you can ignore this using the following command to remove the SSD only falling each disc in this host group).

  esxcli vsan storage remove s naa.id_of_solid_state_disks_here - this is the SSD and all the magnetic disks in a given disk group.

  After that, I was able to manually add hosts to the cluster, leave maintenance mode and configure the disk groups. Aggregated data of the vSAN data store is correct now, and everything is functional.

  Another question for those of you who still read... How to configure such as the VM storage strategy that migrates towards (or inspired) the vSAN data store will immediately resume the default storage policy, I built for VSANs?

  Thanks for anyone who has followed.

• Difference between ADVM Volume and filesystem ACFS ASM disk group

  Q1. What is the difference between an ASM disk group and a Volume of ADVM?

  In my opinion, an ASM disk group is actually a logical volume to the database (including the FRA files) files.

  11 GR 2 appears to have introduced the notions of volumes ADVM and filesystems ACFS.

  11 GR 2 ASM disk group can contain:

  • ASM disks
  • Volumes ADVM
  • Filesystems ACFS

  Q2. ADVM volumes appear to be dynamic volumes.

  However is it therefore not effectively overlaying a logical volume (the volume ADVM) under ASM disk group (conceptually a logical volume as well)?

  Even worse, if you left the ASM disk group redundancy in hardware RAID / SAN level (as recommended Oracle), you actually have 3 layers of logical disk? (ASM on top of ADVM on top of RAID/SAN)?

  Q3. If it is 2 layers of logical disk (i.e. on top of ADVM ASM), what makes this better than 2 layers using a 3rd party volume manager (for example the DSO at the top of the 3rd party LVM) - something Oracle encourages against?

  Q4. ACFS file systems, seem to be file systems clustered for not including ORACLE_HOMEs database files, application exe etc (but NOT GRID_HOME, OS root, OCR or voting records)

  Can you create / modify filesystems ACFS using ASM.

  The diagram of topology of oracle for ASM in ASM 11 GR 2 administration guide, says ACF in ASM. I'm not sure about that if ACFS belongs to ASM or ASM is located at the top of the ACF?

  Q5. Connected to the 4th quarter. There seems to be a number of different ways, ACFS file systems can be created? Which of this is the valid methods?

  • Thanks to ASM?
  • through native OS file system creation?
  • through OEM?
  • through acfsutil?

  my head explodes

  Any help and clarification appreciated

  Jim

  
  

  Q1 - volume ADVM is a type of special file created at the DG of the DSO.  Once created, it creates a block device on the BONE itself which can be used as any other block device.  http://docs.Oracle.com/CD/E16655_01/server.121/e17612/asmfilesystem.htm#OSTMG30000

  Q2 - the asm disk group is a group of disks, not really a logical volume.  It combines the attributes of both when it is used for purposes of database as the database and some other applications know how to talk about Protocol 'ASM '.  However, you won't find all the versatile applications that can do.  In addition, some clients prefer to deal directly with files and devices of volume systems which ADVM is forced to make.  In your thinking, you have 3 layers of logical disk, but each of them provides features and different attributes.  This is not a bad thing, though, as each has a slightly different purpose - os file system\device, specific database and storage-centric.

  Q3 - ADVM is specifically developed to extend the features of the DSO for use by General applications of BONE.  It includes the performance of database features and is tuned to work well in this situation.  Because it is developed in-house, it benefits from the design of ASM model.  In addition, rather than having to communicate with several vendors for support, your support is limited to calling Oracle, a single window.

  Q4 - you can create and modify filesystems ACFS by using command line tools and the ASMCA.  Creation and modification of logical volumes coming through SQL (ASM), asmcmd and ASMCA.  EM can also be used for the two elements.  ACFS is located at the top of the ADVM, which is a file in an ASM disk group.  ACFS is aware of the characteristics of the ASM\ADVM volumes and tunes it's IO make best use of these features.

  Q5 - several ways:

  1) connect to ASM with SQL, use 'alter diskgroup add volume' as Mihael points out.  This creates an ADVM volume.  Then, put in shape volume using the "mkfs" (* nix) or acfsformat (windows).

  (2) use ASMCA - a GUI to create volume and a file system.  Probably the easiest if your head is explosion.

  (3) use "asmcmd" to create a volume and 'mkfs' to put in shape file ACFS system.

  Here is information on the ASMCA, with examples:

  http://docs.Oracle.com/CD/E16655_01/server.121/e17612/asmca_acfs.htm#OSTMG94348

  Information about the command line tools, with examples:

  Basic steps to manage systems Oracle ACFS

• Standby Database ASM disk groups

  Hi guys

  I wonder if someone can tell me - a database of Eve should have a similar configuration to its ASM disk groups?

  My production database has groups of two disks, one for data and one for temp.  Can I go out with one single diskgroup in my database pending or do I need both the same name as the production database?

  See you soon

  Simon

  You need not the same configuration between the primary and standby.  But I prefer to do the the same because it is easier to manage.  Oracle recommends also 2 groups in any case.

  Hope that help

• How to move or migrate whole directories between ASM disk groups?

  Hi all!
  
  I'm playing with Oracle ASM and Oracle Database 11 g R1, I am a student. It's just for testing purposes.
  
  Features of the computer are:
  Processor: Intel Pentium 4 HT 3.00 Ghz.
  Memory RAM: 2 GB.
  Hard drive: 250 GB
  O.S.: Windows XP Professional Edition SP 2.
  
  I installed Oracle ASM, I have created an ASM disk group (+ FRA), I installed Oracle Database and I created a test database. The database works correctly on the ASM disk group. Days, I got help on the initialization parameters, DB_CREATE_FILE_DEST, DB_CREATE_ONLINE_LOG_DEST_1, DB_CREATE_ONLINE_LOG_DEST_2 and DB_RECOVERY_FILE_DEST, according to their function, I created another 3 ASM (+ FILES, LOG1, LOG2) disk groups. There are four initialization settings pointing to its corresponding ASM disk group. As you can deduce, for the time of installation of the Oracle database, I used the ASM '+ FRA' disk group and inside the directories were created: CONTROLFILE, DATAFILE, ONLINELOG, fichier_parametres, TEMPFILE, and the SPFile.
  
  My point is that I want to move or migrate the DATAFILE, fichier_parametres, TEMPFILE directories and the SPFile to '+ FILES', ONLINELOG and CONTROLFILE to '+ LOG1' and '+ LOG2', in this way, the ASM '+ FRA' disk group will contain the Flash recovery area only. What is the procedure for that?
  
  Thanks in advance!

  user1987306 wrote:
  Hi all!

  My point is that I want to move or migrate the DATAFILE, fichier_parametres, TEMPFILE directories and the SPFile to '+ FILES', ONLINELOG and CONTROLFILE to '+ LOG1' and '+ LOG2', in this way, the ASM '+ FRA' disk group will contain the Flash recovery area only. What is the procedure for that?

  Thanks in advance!

  Hello

  There are two approaches that you can use, here are some
  -To move the data file, start the database in State of Mt.
  RMAN > copy datafile '+ FRA/xxx' to '+ FILES1 ";
  SQL > alter database file rename '+ FRA/xxx' '+ fichiers1/xxx. "

  -To move the temporary file
  SQL > alter tablespace TEMP add tempfile '+ FILES1' SIZE 10 M;
  SQL > alter database file temporary '+ FRA/xxx' drop;

  -To move onlinelog
  SQL > alter database add logfile Member '+ LOG1' group 1;
  SQL > alter database add logfile Member '+ LOG2' group 1;
  SQL > modify the members of database drop logfile "+ FRA/xxx."

  -To move controlfile
  SQL > restore controlfile on '+ FILES1' of '+ FRA/xxx. "
  the spfile update to reflect the new location of the controlfile

  See you soon

• Look at one of these two hard disks in Windows

  Hi guys

  Sam X 200 m/n: PSPBUA-00N007 running a Vista Ultimate operating system.

  I wanted to see if I can get Windows to recognize the two hard drives as a single. I tried to change the 2nd HARD disk to a dynamic and extending of the primary HARD drive, but it doesn't seem to work.

  Can I do this in Windows? Or is the OEM Toshiba which prevents me from doing this?

  Any suggestion would be fantastic.

  Thank you very much

  Hello

  what you would have is a RAID stripe both of your HDD´s. But is there a RAID controller installed in this machine? I Don t think so and even if yes, then you need to reinstall your operating system, but you must first create a RAID 0 stripe.

  Because the machine (as I know) is not equipped with a RAID controller, then a regular SATA controller you will have no chance.

  Welcome them

• Disk groups creation fails

  After having manually by selecting a desired group of HARD drive and SSD for creating a disk group, the operation took place, but there is no group created disc.

  There are currently two possible problems that can be the cause of this behavior. In most cases, it has to do with Virtual SAN conceded not correctly. License cluster via the Web Client vSphere Virtual SAN. Virtual SAN feature is not automatically added to the cluster when a Virtual SAN license is added to the catalog server vCenter license.

  The second possibility is the vSphere Client Web refresh time out. Depending on the number of disk groups and the number of disks, the end of the operation can take a long time. Disconnection of their system and log in.

• Question on the addition of LUNS to the disk group

  The GI version: 11.2.0.3.0
  Platform: OEL
  
  I have to add 2 TB for the following disk group. Each logic unit number is 100 GB in size.
  
  100 x 20 GB is 2 terabytes. Which means that I have to run 20 orders as below
  

  SQL> ALTER DISKGROUP DATA_DG1 ADD DISK '/dev/sdc1' rebalance power 4;

  Each ALTER DISKGROUP... Rebalancing of the command Add DISK takes about 30 minutes to complete.
  Thus, this operation will take 10 hours to complete.

  ie. 20 x 30 = 600 minutes = 10 hours !!!

  I have a 3-node RAC. Can I run DISKGROUP ALTER... Orders of DISK to be added in parallel with each node? Will ASM instance allows
  several operations of rebalancing in a single disk group?

  http://docs.Oracle.com/CD/E11882_01/server.112/e18951/asmdiskgrps.htm

  Oracle ASM can rebalance of Group of disk at once on a given instance. If you launched balances multiple groups of different drives on a single node, Oracle then processes these operations simultaneously on additional nodes if necessary; otherwise, the rebalancing is performed in series on the single node. You can explicitly run balances on groups of different disks on different nodes at the same time.

  Why do you need to run 20 of these commands?

  You can not only add 20 records at one time:
  ALTER DISKGROUP DATADG ADD DISK
  "diska5/devices / ' NAME disk1.
  "diska6/devices / ' NAME disk2.
  "diska7/devices / ' NAME disk3.
  ...
  .. .etc

  You will need to should not manually rebalance as Oracle will automatically do the rebalancing when configuration changes unless you want to use a default value of such power as defined by the ASM_POWER_LIMIT parameter. You can run the command above with an option of rebalancing so if you you need to do.

• Controlfile and Redo Log on a disk group

  Hello!
  
  Controlfile and Redo Log on a disk group - it's good or bad?
  
  You have the best practices or Doc ID on Metalink?

  918027 wrote:
  You must have two control files on two separate disks and at least 2 members of each group redolog, each on a separate drive.

  http://docs.Oracle.com/CD/B10500_01/server.920/a96521/control.htm#4578

  No, you do not have "must have".

  You have not yet 'must have' more than a control queue.
  You do not have 'must have' more than 2 redo log groups, and these groups don't 'must have', but one file each.

  This is the "must have".

  Now, it's something else.

  You "should" have a minimum of 2 files of control, and that they "should" (not "needs") be on separate disks.
  You "should" have at least 2 files of members in each group of redo log, and that they "should" (not "needs") be on separate disks.

  And FWIW, I see no reason to keep necessarily completely separate redo file control file. They key is to have versions multiplexed of a particular type, separated from their 'twin '.

• How to add ASM Disk to Disk Group that is displayed as a MEMBER?

  Hello
  
  We have a Production Oracle RAC on HP - UX. We have two disk groups for Arcive (ARC_DISK) and the other for Database (DATA_DISK).
  
  Today, I wanted to add another 200 GB of disk space to DATA_DISK group.
  
  I opened DBCA and did not find the new drive in the option "show the candidates." But after that the administrator modified Unix ownership and permission to drive, it has been shown in the option "show the candidates." I chose this drive and continued but got an error later because we changed the ownership and permission of the 2nd Unix server. After doing this, when I opened DBCA to add disk, nothing does not appear in the option 'Show candidates', but when you click on "Show All", the new drive is listed as MEMBER (header status) but not assigned to a disk group.
  
  I would like to know how to distribute this disk (which is already displayed as a MEMBER) to DATA_DISK - ASM diskgroup. It is a system of production database.
  
  Rgds,
  
  Thiru

  Gr8.
  Good to hear that.

• Question about the use of size mixed with ASM disk groups

  I support a RAC 10 g 10.2.0.3 running and using ASM cluster. We currently have a group of data disks, which is 600 GB in size, consisting of 3 individual raw disk 200 GB devices. The RAC cluster runs on a server pSeries IBM using AIX 5.3
  
  I need to add more space, but the system administrator can give me only 100 GB in the new raw device. What will be the impact, if any, the addition of this feature of smaller crude disk in the same data ASM disk group? I understand that ASM is trying to "balance" the general use of each raw device. ASM still works very well, or will he constantly try to rebalance the disk group because the a raw device is only half of the other three? Any help and advice would be greatly appreciated. Thank you!

  It works, I do the same thing in a production database. What happens is, asm will distribute data on the size of the disks. 200 GB drives will get two times more data than the 100 GB drive. The downside is that it will also result in an unequal distribution of the IOPS / s: adults discs will be achieved more often.

  Bjoern

• PowerEdge 2950 advanced settings recommended virtual disk group

  Hey guys, I was hoping that someone out there has had some information about the nature best practices or the best settings for these two configurations of a Dell 2950 with PERC 5 controller / i.

  Senario 1

  Reference Dell 2950 Windows Server 2003 Enterprise Edition 32-BIT

  RAID 5 (5 TB) hardware RAID & Windows dynamic disk Configuration

  PERC 5 / i with battery

  Group of virtual disk current avancΘs

  Virtual disk 0 - Adaptive Read Ahead and Write Back

  Virtual disk 1 - Adaptive Read Ahead and Write Back

  Senario 2

  Reference Dell 2950 Windows Server 2003 Enterprise Edition 32-BIT

  RAID 5 (5 TB) hardware RAID & Windows dynamic disk Configuration

  PERC 5 / i with battery

  Group of virtual disk current avancΘs

  Virtual disk 0 - Adaptive Read Ahead & direct writing

  Virtual disk 1 - Adaptive Read Ahead & direct writing

  The second server now has a battery that has failed and we are on the way. I want to add that I just found out that a bad or dead battery kills performance on the server reading and the writing speed. After replacing the battery on the first server, I saw performance increase by at least 300% if it is longer. So this lead me to read a lot of posts by others, but I couldn't find a solid peg that indicates what should be the best configuration. So my questions are... What is the best configuration for Virtual Disk Group advanced settings for MY servers above WITH a controller battery? Finally, what happens if I didn't use the battery which is recommended then? Is it better to use a battery or be without one? Bottom line is that I best performance of reading and writing, thank you to you all!

  300% is too much of a performance increase to attribute entirely to the write cache is enabled, even if it makes a significant difference.  When the battery goes bad, the controller disables the write cache, and it is the source of the performance difference.  Unless you have a specific reason to disable the cache (and I see no good reason), it must be enabled.  You can not force the controller to use memory cache without battery, not to mention that it's dangerous for your data to use the cache without battery.

  "Bottom line is that I the highest performance for reading and writing, thank you to you all!

  Bottom line... turn write cache (write back) and replace the batteries when needed (which should not be often).

• Syn function between two hard disks

  Is there any function of Syn in the Mac OS already has syn function between two hard disks?

  Just checking, do you mean sync?