VMFS block sizes - that affect files in the disks?

Similar Questions

• SAN LUNS vs. VMFS Block Size block size

  Hi all

  I searched a bit and you read some documents on VMFS block sizes and alignment. However, I'm still a little confused. I think I get the concept of aligning vmfs partitions and how the block size affects max vmdk/size of the file on a partition. When creating new virtual disks and LUNS on my SAN, however, I can choose the sizes of different block there, as well.

  Choose size of block even when you create a SAN LUNS as VMFS partition that will reside on this subject? There is also 'the band height' and I wonder how it might affect things. The default value is 64 k, which I was using.

  Thank you very much

  Take a look at: disk partition alignment

  Block is not to same size, cause VMFS use big block (not available at the level of storage).

  André

• What is the unit allocation size that is displayed in the window to format USB?

  Original title: allocation unit size

  What is the unit allocation size that is displayed in the window to format usb

  Hi Moaz,

  Thanks for posting your question in the Microsoft Community.

  I understand that you want to know the unit allocation size that is displayed in the format USB window. Correct me if I'm wrong.

  I will certainly help the question of fixing.

  In computer file systems, a cluster is the unit of allocation of disk space for files and directories. To reduce the load of the management of data on disk structures, the file system allocates no individual disk sectors, but contiguous groups of sectors, called clusters.

  On a disk that uses 512-byte sectors, a 512-byte cluster contains one sector, whereas a 4-Kibibyte (KiB) contains eight sectors.

  Refer to the below mentioned article and see if it provides information that you are looking for.

  By default for NTFS cluster size, FAT and exFAT:

  http://support.Microsoft.com/kb/140365

  Your response is very important for us to ensure a proper resolution. Please get back to us to help you accordingly.

• Is there any application that searches all files on the disk or server which also indicates the total and available space?

  Is there any application that searches all files on the disk or server which also indicates the total and available space? And after a search, it can also be exported to excel for further analysis?

  Hello

  See if that helps you.

  This free program allows you to see what is taking place.

  http://www.Jam-software.com/treesize_free/

  Here's how to understand Treesize Screenshots:

  http://www.Jam-software.com/treesize_free/screenshots.shtml

• When you try to move an image to a folder, whatever that means - "this will cause the file on the disk to remove. If you continue, this movement or any changes you made before it can be canceled?

  When you try to move an image to a folder, whatever that means - "this will cause the file on the disk to remove. If you continue, this movement or any changes you made before it can be canceled?

  I saw wording like this before, and I don't think it's anything to worry about. I don't know why Adobe chose these specific words, that your changes are certainly editable after the move.

• Linux RT - copy the file from the disk on USB

  Hi migration my code to a target of VxWorks to one target Linux RT (9068), I'm having problems to run a piece of code that copies files from the cRIO on a USB drive!

  This code works perfectly under my VxWorks (and same Pharlaps target). See attached VI.

  

  Some files (100k.txt, 1M.txt,...) are present in the my drive 9068 tmp folder. And I want to transfer them to my USB Flash DRIVE (U).

  The two folder exist when the code is running (checked with my WebDAV client).

  When running, the copy function returns 'error 8': authorization error.

  So I tried to check what was my permission on the folder U: 511. I tried to change the permission to 700: error 8!

  I then checked 'who am I'-online lvuser. I then connected to my webpage cRIO-online user permissions => I added my lvuser 'FSRead' and 'FSWrite' rights. The reboot of the target. -Online copy of files always returns error 8!

  However, it seems that I can create and write to a file in the folder U... I can read the files in the folder U... but not copy? !! ??

  What is going on? Can someone tell me how to copy files from my cRIO on my USB drive? Why is it difficult to do the basic things?

  Hi Paolo,.

  As described in my second post, file tmp is not the problem.

  I wrote to / c or even in/home/lvuser... Has not changed anything.

  It seems to me that the cam of problem of the fact that a lvuser (default user executing code lv) can not fundamentally 'touch' files created or modified by an administrator...

  In the first link you posted, at the end of the document, it is written:

  "Access the file and folder permissions are not applied on targets in real time OR the operating systems VxWorks or PharLap.  Objectives NI Linux in real time, on the other hand, use and apply the standard Linux style file and folder access permissions. »

  As I am not very familiar with the Linux environment, I might be nice to have more details about access permissions style of this linux standard.

• Windows media player encountered a problem burning the file on the disk

  What does that mean? Im trying to burn music to a disk and keep getting this msg... HELP... windows media player encountered a problem burning the file on the disk

  Hi michealarthur,

  Here are a few things to try:

  1. make sure that the disc is clean.

  2. Select a recording speed (write) more slow for the CD burner.

  3. try a different brand of blank discs.

  4. stop all other programs that are running.

  5 disable any programs that could activate themselves, while burning is in progress, such as screensavers or anti-virus programs.

  6. defragment your hard drive.

  7. make sure that the hard drive does not use disk compression.

  Change settings for burning a CD or DVD in Windows Media Player

  http://Windows.Microsoft.com/en-us/Windows7/change-settings-for-burning-a-CD-or-DVD-in-Windows-Media-Player

  Also...

  You can try this procedure to restore your windows media player.

  (1) Perform SFC first. Follow the link on how to make SFC (http://support.microsoft.com/kb/929833)

  (2) turn on / off Windows Media Player again.

  a. go to start and in the search type 'Turn Windows has or not'.

  b. click on the "Turn Windows features on or off".

  c. check the "media features.

  d. restart the computer.

  You can also try restore (http://windows.microsoft.com/en-us/windows7/products/features/system-restore) your computer to the final point where windows media player worked.

  Or you can use the previous versions of windows media player that comes from restore points or windows backup.

  Or you can try to run 'Fixit '.

  http://support.Microsoft.com/mats/windows_media_player_diagnostic/

• 'Cannot open file because the disk is not available' Mac

  I recently changed the selection of Photoshop (CS6) Scratch disk to the boot drive by default to one of the other internal drives in my MacPro (OS 10.6.8).

  When I restart Photoshop (CS6) I get the message:

  "Cannot open file because the disk is not available"

  and Photoshop will not start.

  I then restart Photoshop with 'Control - alt - shift' keys

  (suggestion to <http://forums.adobe.com/message/3937003>)

  and reset preferences that allows Photoshop to return.

  (Reset preferences returned the boot drive to drive work status.)

  I have an another MacPro, the - same 10.6.8 OS and Adobe CS6 - and I don't have this problem of allocation of work disk.

  What happens with a MacPro which prevents me from selecting one drive other than the boot drive working Photoshop

  Probably a permission problem.  Run the Apple disk utility to repair permissions.  If this does not work the glance to the non bootable drive and check "Ignore permissions..."  Open the window Info Finder and it came inside.

• Problem writing external file on the disk mounted outdoors in Windows

  People,
  
  I have a strange problem with a simple OWB mapping where I am dumping the contents of a table to an external file.
  The versions are OWB v 11.2.0.2 64 - bit on Oracle RDBMS 11.2.0.2 2007 Windows 64 - bit Enterprise Server.
  
  When the external files module is connected to a place that point to a local drive and directory on the OWB server, everything works fine - files are created and written.
  When the external files module is connected to a location that points to a disk mounted on another Enterprise 2007 64-bit Windows Server, I get + "path not valid for the target file, check if the connector is deployed correctly. +
  
  The "File System Path location" in OWB is set to "N" (no slash anyway). ' ' Test connection ' reports OK.
  
  I gave the os user Oracle and "Everyone" (for good measure) all rights on the mounted disk, and I see that the package generated code uses the correct directory, and the directory path is correct on the server. The drive mounted (N :) should appear as a local disk to Oracle I see. I am able to create and delete files on the disk using a command line on the OWB/DB server.
  
  I'm scratching my head on this one...

  Hello Haakon,
  try to specify the directory in OWB with UNC path (instead with a letter, as \\other-server\shared-resource of the drive).
  MS Windows sessions for executed OWB mapping and where you map resource network to the drive letter is different - maybe it's a reson why you can't access the mapping file.

  You close your session to the Oracle database server after network sharing the drive letter mapping?

  Kind regards
  Oleg

• Bootcamp - Windows 10 should not see or read files from the disk HARD Apple intern.

  I have just successfully Windows 10 next OS X on my 15 "Macbook Pro mid-2014.

  Windows 10 should not see or read files from the disk HARD Apple intern.

  Should which driver I uninstall?

  On OSX, if the following Terminal command produces any output, then you cannot read partition OSX on the side Windows? FileVault2 will also disable access to the OSX partition.

  Cs diskutil list

• Block size is too small - reformat the data store or create files VMDk 2?

  Hello

  I'm new to VMware and so far I absolutely love everything about her!  Well, I was not too happy when I realized that I can't create more than 256 GB a drive without reformatting the VMFS datastore.   Apparently, I accepted the block size of 1 MB by default during the installation...   I now need to configure a file server with about 500 GB of storage.  The data store with a larger block size (4 MB would be fine for me) reformatting is easy enough?  I am currently working on the first host ESXi 4.1 and will move to set up 2 more hosts in the coming weeks.  I read somewhere on the forum that ESXi 4.0 doesn't let you change the block size by default of 1 MB - is this true or relevant to 4.1?

  Currently, I have only 2 small VMs on that host, and these can be easily saved and put offline for a few hours, if necessary.  When starting the server, I created a single RAID array that holds ESXi and all virtual machines - does that mean that I have to reinstall ESXi in order to increase the size of the block?

  An alternative that I can get to is to simply create 2 255 GB VMDK each and load distribution of storage in the guest operating system (Win 2008).   Performance wise, is a disc more great and better (or worse) than the two smaller disks?

  On a related note, what should I choose for the "Independent" option when you add a new virtual disk?  Default is disabled (not independent).

  Your thoughts, focus and expertise are welcome and will be greatly appreciated!

  Thanks in advance,

  Dothan

  Dothan,

  You should power (after the virtual machine backup) remove the current data store and create a new one with the new block size. I did not have this on ESXi 4.1 again, however, he worked on ESXi 4.0.

  The maximum size of VMDK. If you want ot be able to take pictures, make sure you subtract twice the size of block in GB of the documented maximum size.

  Block size 1 MB--> 254 GB (= 256 GB, 2 GB)

  Block size of 2 MB--> 508 GB (= 512 GB - 4 GB)

  Size of block 4 MB--> GB 1 016 (= 1 024 GB - 8 GB)

  Block size of 8 MB--> GB 2 032 (= 2 048 GB to 16 GB)

  André

  EDIT: Just the KB for the maximum sizes. http://KB.VMware.com/kb/1012384

• Pointer of RDM / vmfs block size?

  We run ESX 4.0 on Dell R710s connect to a network SAN IBM N-Series on CF.

  This week we had a major outage due to a server RedHat MySQL fall.

  Off firstly the server wouldn't boot past virtual POST-sachant a RDM disk I have it deleted from the configuration. The server would then boot to OS, but every time that the ROW was reconnected it would either fall or unbootable.

  I remembered we had farily recently expanded space on this server and the RDM was now 300 GB in size. However the space used was only 85% on the lun (255GB). Then I remembered the limits of block size. The server was sitting on a partition vmfs with a block size of 1 MB (256GB max). So I removed the RDM and svMotion had the server in a data store that have a block size of 2MB, reconnected the RDM and the server starts very well. After a consistency check DB we were back running.

  This survey of fault, I went to read the document of maximum rates of the white paper

  http://www.VMware.com/PDF/vSphere4/R40/vsp_40_config_max.PDF

  to be honest - had some vague information on RDM

  and then I found VMware KB

  http://KB.VMware.com/selfservice/microsites/search.do?language=en_US & cmd = displayKC & externalId = 1029697

  surprising to me, which clearly states the pointer RDM files are affected by the block vmfs sizes.

  However, there is a difference of opinion in this thread

  http://communities.VMware.com/message/1507498

  And look further in my own environment, we have several production server running with connected RDM which are excessive in size until the limits of said block size.

  I need clarity defined on it because as he sits down we could have several production machines in an unstable state, or I'm just left with no explanation for the disc lock, we witnessed and a power outage that caused a substantial loss of business.

  concerning
  wolfsonmicro

  Post edited by: wolfsonmicro Click accidental - it is always a request without response

  My understanding is that the LUN cannot be greater than the maximum size supported by the data store on that of RDM file pointer is created.  Pointer RDM file does not need to be stored on the same data store, Setup or other files vmdk files, for example you could have moved the file pointer RDM from a store of data with a larger block and left the vmx file and the data store other files vmdk with a block of 1 MB.

  Are you sure that files of pointer RDM for running virtual machines, you have on data with blocksizes warehouses NOT supporting the LUN size they point?

• VMFS block size during installation?

  I installed ESXi 3.5 u4 on a server with a 900 GB RAID array. The problem is that the ESXi install automaticaly consumes all of the disk with a data store VMFS with a block size of 1 MB. This prevent me to create virtual discs to 256 GB on the data store. I need to create a virtual big 600 GB disk but cannot. How to work around this limitation?

  Is there a way to change the size of the block to 4 MB during installation? Or is there a way to limit the installation to the use of only a 20 GB volume, leaving the remaining space for a new 600 MB VMFS volume that I create through the console without problem? Y at - it a boot disk utility that I can use to create the small partition setup ESXi will recognize?

  Assuming that you have not added any virtual computer, you can remove the data store and recreate it using your chosen block size.

• How to block emails that are not in the list of contacts

  I have several e-mail everyday on sexualy explicit materia.  I put in my email account to block those who are not in the list of contacts, so they'll JUNK, but I need to check my JUNK e-mail folder frequently if there is something in there for someone that I have to answer.

  With some of the emails that I can "unsubscribe", but there must be a way to disable these ugly e-mail.

  Any suggestions?

  Margin

  I have several e-mail everyday on sexualy explicit materia.  I put in my email account to block those who are not in the list of contacts, so they'll JUNK, but I need to check my JUNK e-mail folder frequently if there is something in there for someone that I have to answer.

  With some of the emails that I can "unsubscribe", but there must be a way to disable these ugly e-mail.

  Any suggestions?

  Stopping the churn.  If they are unscrupulous - that simply confirms your e-mail address is * well * and it will be resold to new lists.

  Specifically, add them to your list of mail JUNK when you can, if you doubt, you will always receive an email, just to be sure, their entire domain.

  The only other suggestion is to get an other email address for your personal & business needs and start using it.  Make sure that you register for what whatever randomly with this specific e-mail address (control which give you out.)  A * lot * of junk mail occurs usually because someone came to something random at some point and then the address obtained on a 'list' that was happening around / sold.

• Is there a size limit to file for the MP3 files on a Sandiak Clip +?

  I bought the Clip + SanDisk so I could download radio 4 comedy programs to be able to listen to them during long car transfers. However, even if I can download files of any size and to see through my computer, I am not able to see the files via the Clip +.

  Is there a limitation, and, if so, how can I get around the problem. My files are about 25 MB and I have the 8 GB player with bags of room left.

  Chris

  Dear JK98, Summerlove and Miikerman,

  Thank you very much for your valuable comments, which have guided me to the solution. Error the user just for this purpose - I don't see the folder for "Podcasts"!

  Am now able to enjoy the pleasures of the radio comedy 4 thanks to you.

  Have a great new year party; I'll drink your toast.

  Kind regards

  Chris