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Security and Windows Vista A forum for discussion on security issues with Windows Vista. (microsoft.public.windows.vista.security) |
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BitLocker - why 1500 MB partition?
Hi
Running Windows Vista x64 SP2 beta on a HP notebook. I use BitLocker and have no problems with it. But I have yet to discover the reason for the BitLocker drive have to bee (at least?) 1500 MB in size. Looking at the properties for the drive, I can see that only about 50 MB is in use. Reasons I have thought of could be: - Windows Vista have to have at least 1500 MB on the boot partition (for some reason). - Windows need to have room to save some dump files to a non-encrypted drive. - In case of the need of Windows Repair, it must have room to save files on a non-encrypted drive. These are all unconfirmed theories. So I ask you - What is up with the 1500 MB partition? /Anders |
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BitLocker - why 1500 MB partition?
On Thu, 11 Dec 2008 03:32:20 GMT, "Darrell Gorter[MSFT]" wrote:
Hello Anders, It's required to allow for backup of the volume. If the volume size is too small backup cannot take place on that volume, this would prevent those volumes from being backed up or restored That's not the original reason given. Nor does that explain why in Win7 the partition is only 200 MB. The original reason given was that certain servicing operations, such as patching Office required a certain amount of free space on the system volume. -- Paul Adare MVP - Identity Lifecycle Manager http://www.identit.ca |
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BitLocker - why 1500 MB partition?
Hello Paul,
Not sure what the reason you heard was. There may be other requirements as well. There was a limit in VSS, so Complete PC Backup would not backup the volume unless the size was at least one gig. See this technet article http://technet.microsoft.com/en-us/l.../bb808827.aspx Also, the volume must be at least 1 gigabyte (GB) for DPM to protect it. DPM uses the Volume Shadow Copy Service (VSS) to create a snapshot of the protected data, and VSS will create a snapshot only if the volume size is greater than or equal to 1 GB. There was also an requirement for the volume to have at least 400 meg free in order to be able to upgrade from edition to edition (Home to Ultimate) or from a downlevel OS. Certain setup files as well as the WinPE (boot.wim) file were copied to that volume to loaded on the subsequent reboot. Thanks, Darrell Gorter[MSFT] This posting is provided "AS IS" with no warranties, and confers no rights -------------------- | From: Paul Adare | Subject: BitLocker - why 1500 MB partition? | User-Agent: 40tude_Dialog/2.0.15.1 | MIME-Version: 1.0 | Content-Type: text/plain; charset="us-ascii" | Content-Transfer-Encoding: 7bit | Sender: | Reply-To: | Organization: IdentIT In.c | References: | Date: Wed, 10 Dec 2008 21:52:03 -0600 | Message-ID: | Newsgroups: microsoft.public.windows.vista.security | NNTP-Posting-Host: 12.41.223.154 | Lines: 1 | Path: TK2MSFTNGHUB02.phx.gbl!TK2MSFTNGP01.phx.gbl!TK2MSF TNGP04.phx.gbl | Xref: TK2MSFTNGHUB02.phx.gbl microsoft.public.windows.vista.security:20014 | X-Tomcat-NG: microsoft.public.windows.vista.security | | On Thu, 11 Dec 2008 03:32:20 GMT, "Darrell Gorter[MSFT]" wrote: | | Hello Anders, | It's required to allow for backup of the volume. | If the volume size is too small backup cannot take place on that volume, | this would prevent those volumes from being backed up or restored | | That's not the original reason given. Nor does that explain why in Win7 the | partition is only 200 MB. The original reason given was that certain | servicing operations, such as patching Office required a certain amount of | free space on the system volume. | | -- | Paul Adare | MVP - Identity Lifecycle Manager | http://www.identit.ca | |