Storage Pools - too much overhead?

-

hi all,

i'm experimenting storage pools in windows 2012 r2 vm , seeing interesting disk space utilization / overhead i'm not sure expected.

added 2 10 gb physical disks vm.  the system detects each 10.0 gb.

created storage pool these 2 disks.  after creation, storage pool reports capacity of 18.5 gb 18.0 gb free.  so, i've lost 2 gb (10%).

if use pool create "fixed" virtual disk using "simple" layout, max vd size 16 gb.  the pool still reports capacity of 18.5 gb shows 1.0 gb free.

if delete vd , use same pool create "fixed" virtual disk using "mirror" layout, max vd size 7 gb.  the pool still reports capacity of 18.5 gb shows 1.5 gb free.

using 20 gb of disk , ending 16 gb (simple layout) or 7 gb (mirror layout) seems lot of wasted disk space.  is expected?

thanks!

i've figured out *part* of mystery.

when virtual disk created, there's default setting uses of space create write cache.  if use powershell cmdlet create pool, can 0 default.  in case, "simple" layout max vd 18 gb (instead of 16 gb) , "mirror" layout max vd 8 gb (instead of 7 gb).

this bit better i'm still curious why (a) lose 2 gb when creating storage pool , (b) "mirror" layout isn't using full pool space "simple" layout is.  i'm guessing (b) might space used "dirty region tracking" feature mirror spaces use simple spaces not.



Windows Server  >  File Services and Storage



Comments

Post a Comment

Popular posts from this blog

Motherboard replacement

-
running windows 10 technical preview, need replace motherboard can run the  sysprep  command restoring pc ? or there easier  or more preferred way ? thanks if replace motherboard within same family of chipsets (i.e. intel > intel or amd > amd), should okay restarting pc twice. carey frisch Windows 10 Insider Preview  >  Windows 10 Insider Preview General
Read more

Cannot create Full Text Search catalog after upgrading to V12 - Database is not fully started up or it is not in an ONLINE state

-
in order access new full text search capiblities of sql azure, upgraded our azure sql v12. (a day later), when try create new catalog: create fulltext catalog mycatalog default i following message: msg 9972, level 16, state 100, line 1 database not started or not in online state. try full-text ddl command again after database started , becomes online. hi scott, apologies inconvenience caused you. known issue on service side , fix going included in next update. specific case mitigated, should able use full-text search syntax now. thanks, mihaela Microsoft Azure  >  Azure SQL Database
Read more

Remote Desktop App - Error 0x207 or 0x607

-
hi all, i manage windows 2012 r2 network, including connection broker, session hosts , remote apps virtual servers.  i've used remote desktop app on own android phone, no issues @ - connects published gateway url , can login , access network. we looking move business onto nokia handsets ms operating system (currently on blackberry), not able connect via remote desktop app on nokia lumia handset. setup, per android config , brings remote apps , remote desktop screen, know can connect.  when select remote desktop, shows following process: initiating remote connection securing remote connection certificate can't verified - choose connect it digitally signed cert (digicert sha2), pc name different physical connection broker name (inherited domain name old gov project - can't publish publicly) initiating establishing securing connection error have been 0x207 getting 0x607 a bit baffled, work on android (and ipad @ home using app). assume ms use d...
Read more