|
 |  |  |  |  |  |  |
| Welcome to Windows Vista Forums. Our forum is dedicated to helping you find solutions with any problems, errors or issues you are experiencing with Windows Vista. The Vista forum also covers news and updates and has an extensive Windows Vista tutorial section that covers a wide range of tips and tricks. |
| |||||||
 |
| |
10-29-2008
| #1 (permalink) |
| | pass-through disk Hi all, With Windows 2008 hyper-V, when should we consider using pass-through disk? thank you! |
My System Specs |
|
10-29-2008
| #2 (permalink) |
| | Re: pass-through disk Never? Seriously, the speed differential between fixed disks and passthrough is pretty small. And you lose any ability to leverage the advantages of VHD, or VSS support, etc. But if absolute speed is essential, and you have an application such as SQL Server that will directly manage the disks, then it might make sense. But I won't be using them at all. -- Charlie. http://msmvps.com/blogs/xperts64 http://mvp.support.microsoft.com/profile/charlie.russel "John" <John@xxxxxx> wrote in message news:67FE32FE-0BED-42DD-B26A-5B5E1068FD8D@xxxxxx Quote: > Hi all, > > With Windows 2008 hyper-V, when should we consider using pass-through > disk? > > > thank you! |
| My System Specs |
|
10-29-2008
| #3 (permalink) |
| | Re: pass-through disk Thank you and thank you. The general rule for Hyper-V VM highly available is per VM per LUN. What about VM with lots of drive letters and should we assign more LUNs to it? "Charlie Russel - MVP" wrote: Quote: > Never? > > Seriously, the speed differential between fixed disks and passthrough is > pretty small. And you lose any ability to leverage the advantages of VHD, or > VSS support, etc. But if absolute speed is essential, and you have an > application such as SQL Server that will directly manage the disks, then it > might make sense. But I won't be using them at all. > > > -- > Charlie. > http://msmvps.com/blogs/xperts64 > http://mvp.support.microsoft.com/profile/charlie.russel > > "John" <John@xxxxxx> wrote in message > news:67FE32FE-0BED-42DD-B26A-5B5E1068FD8D@xxxxxx Quote: > > Hi all, > > > > With Windows 2008 hyper-V, when should we consider using pass-through > > disk? > > > > > > thank you! > |
| My System Specs |
|
10-30-2008
| #4 (permalink) |
| | Re: pass-through disk Charlie Russel - MVP wrote: Quote: > Never? > > Seriously, the speed differential between fixed disks and passthrough is > pretty small. And you lose any ability to leverage the advantages of > VHD, or VSS support, etc. But if absolute speed is essential, and you > have an application such as SQL Server that will directly manage the > disks, then it might make sense. But I won't be using them at all. > > have not tested this myself yet, for me it's only hearsay. Did you do tests yet Charlie? However, the Exchange guys say this: Quote: We recommend using SCSI pass-through storage to host transport and mailbox databases and transaction log files. Although using pass-through disks limits the portability of virtual machines, this configuration has shown to provide the best performance of all storage options for a virtualized Exchange server. / ) Regards, / /_________ _|__|__) Paul Weterings / (O_) http://www.servercare.nl __/ (O_) ____(O_) |
| My System Specs |
|
10-30-2008
| #5 (permalink) |
| | Re: pass-through disk No personal tests (my use is very different, and I almost always use expanding disks). But this was as reported by the product team at the launch event in Bellevue. I don't remember the number, but it was in the single digits of percentage, at best. -- Charlie. http://msmvps.com/blogs/xperts64 http://mvp.support.microsoft.com/profile/charlie.russel "Paul Weterings" <Paul-nospam-@xxxxxx-dot-com> wrote in message news:4909b30b$0$16196$e4fe514c@xxxxxx Quote: > Charlie Russel - MVP wrote: Quote: >> Never? >> >> Seriously, the speed differential between fixed disks and passthrough is >> pretty small. And you lose any ability to leverage the advantages of VHD, >> or VSS support, etc. But if absolute speed is essential, and you have an >> application such as SQL Server that will directly manage the disks, then >> it might make sense. But I won't be using them at all. >> >> > have not tested this myself yet, for me it's only hearsay. Did you do > tests yet Charlie? > > However, the Exchange guys say this: > > Quote: > We recommend using SCSI pass-through storage to host transport and mailbox > databases and transaction log files. Although using pass-through disks > limits the portability of virtual machines, this configuration has shown > to provide the best performance of all storage options for a virtualized > Exchange server. > > -- > > / ) Regards, > / /_________ > _|__|__) Paul Weterings > / (O_) http://www.servercare.nl > __/ (O_) > ____(O_) |
| My System Specs |
|
10-30-2008
| #6 (permalink) |
| | Re: pass-through disk If you need a drive letter, you should assign a LUN to it, IMHO. -- Charlie. http://msmvps.com/blogs/xperts64 http://mvp.support.microsoft.com/profile/charlie.russel "John" <John@xxxxxx> wrote in message news:3D0F453E-8B1D-4A00-9E63-087AFEE57B0A@xxxxxx Quote: > Thank you and thank you. > > The general rule for Hyper-V VM highly available is per VM per LUN. > > What about VM with lots of drive letters and should we assign more LUNs to > it? > > "Charlie Russel - MVP" wrote: > Quote: >> Never? >> >> Seriously, the speed differential between fixed disks and passthrough is >> pretty small. And you lose any ability to leverage the advantages of VHD, >> or >> VSS support, etc. But if absolute speed is essential, and you have an >> application such as SQL Server that will directly manage the disks, then >> it >> might make sense. But I won't be using them at all. >> >> >> -- >> Charlie. >> http://msmvps.com/blogs/xperts64 >> http://mvp.support.microsoft.com/profile/charlie.russel >> >> "John" <John@xxxxxx> wrote in message >> news:67FE32FE-0BED-42DD-B26A-5B5E1068FD8D@xxxxxx Quote: >> > Hi all, >> > >> > With Windows 2008 hyper-V, when should we consider using pass-through >> > disk? >> > >> > >> > thank you! >> |
| My System Specs |
|
| Thread Tools | |
| |
Similar Threads | ||||
| Thread | Forum | |||
 I don't know my pass login | General Discussion | |||
| By Pass UAC for some old programs | Vista security | |||
| pass word | Vista mail | |||
| Won't except pass word | Vista mail | |||
| pass Parmater | PowerShell | |||
