Server 2012 and 2012 R2 do not allow access to all 7 optical SAS drives?

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the following problem occurs windows server 2008 r2, 2012 , 2012 r2, datacenter or standard. 

i have external sas enclosure 7 optical drives , 1 hot-swap sas/sata bay connects using 2 sff-8088 connectors (no internal sas expander, etc.).  purpose use 7 bluray writers write multiple copies of large database simultaneously.  optical drives used read datasets come on multiple discs (usually 8-12 per dataset , 15 datasets @ time).  because of volume, more optical drives better.  regardless of type of sas controller used connect enclosure, significant functionality missing.

for writing, best connect directly optical drives (which own buffering) hba seem better hardware raid controller.  have tried several hbas, including lsi-9211, lsi-9240-it, dell h310-it.  in cases, windows sees four dvd drives , hot-swap bay.  drives windows sees work reading , writing.  megaraid storage manager (lsi controller software) sees 7 optical drives , hot-swap bay.  lsi says must windows problem.  strangely, if remove (any) 3 optical drives , replace them hot-swap bays, 8 devices recognized windows.

if use true raid controller (tried lsi-9260, dell h800, dell h810, hp 812p, ibm 5015), windows , msm see 7 drives , hot-swap bay, reads optical drives fine, writing large discs times out (presumably because of buffering raid card) can't write dvds.

is there way server recognize 7 optical drives on hba?  ideally, i'd add several of these enclosures can't 1 working properly!

the system tyan (dell) mb dual xeon e5-2620s , 64gb rdimm.  includes lsi-9260 (2tb sas 10k in raid 0), dell h810 (32tb sas in raid 6), , lsi-9211 (optical enclosure + 3tb hot-swap).  installed server 2012 r2 datacenter testing.

any appreciated.

sas serial attached scsi, sata serial eide old ide controller pc replacement large complex card , dumb disk

sas came scsi controller logic adaptec amazingly still alive

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Windows Server  >  File Services and Storage



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