[Linux-PowerEdge] Q: Possible to access "PowerVault 114x" via chain-through on MD3200?

cupertino cupertino at gmx.net
Thu Apr 3 14:39:07 CDT 2014

I'm 100% sure a tape drive connected to MD3200 is not supported and
almost 100% sure it isn't working too. MD has its own controllers which
hide all devices from any connected host by default. In order to make a
volume available to a host you'll have to define a host mapping, which
can only be done with volumes (virtual disks). Mappings of physical
disks are not possible, so I assume a 'physical' tape drive won't be
available for mapping. Besides the system is very picky about installed
hard drives and back-end cabling. Most likely the tape drive will be
block or you'll end up with heaps of cabling errors. 

As far as I know S100 is on-board and can be disabled in BIOS. S300
would be a separate card. So I'm not entirely sure what's in your 2nd
slot. If you're running Linux on the system, most likely there is some
other controller installed already because there are no Linux drivers
for Dell's software enabled RAID controllers. 
SAS6/iR has definitely not external SAS connectors. 

On Thu, 2014-04-03 at 13:15 -0600, Stephen Dowdy wrote:
> I may be asking a stupid question, but i've been thrown a problem
> with consolidating several systems/devices ultimately ending with:
>    PowerEdge R310 (S100 card + SAS6 HBA) (all slots full)
>    2 x MD3200 storage devices
>    1 PowerVault 114x (LTO5 tape drive)
> The SAS6 HBA (2xSFF8088) will be used to connect to the two
> MD3200's, but given the other PCI slot is already occupied by the
> S100, there's nowhere for me to put the PowerVault 114x.
> My initial thought:  There's got to be a way to expose the PV114X
> through the MD3200 as a LUN, so that i could chain it on the
> SATA OUT on one of the MD3200s.  I can't find any references of
> someone doing this, and the MD Storage Management User Guide has no
> reference to "Tape Drives", nor does the MD3200 manual i've come
> across (just chaining MD1xxx enclosures), nor the PV114X manual.
> (and these other devices are currently in production use, so i
> can't test this theory out empirically, yet)
> Anyone know if this is:
>     Possible?
>     Supported?
> In lieu of that possibility, it appears that the PER310 does have
> an Integrated RAID slot option (Slot 3 in the Technical Guide,
> which is way substandard to previous Dell 11gen PE TechGuides)
> (I'm not sure i see where the card would go from the PER310 tech guide)
> So, i suspect i should be able to purchase a SAS 6/iR to replace
> the S100, freeing the PCI slot to put another SAS HBA card in.
> (i already have the SFF8470 SAS5 HBA card + SFF8470<->SF8088
> cable for the PV114X).
> Any thoughts on this?
> thanks,
> --stephen

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