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How many luns does mac OSX support from a single target (array) is it 255??

How many luns does mac OSX support from a single target (array) is it 255?


For example, if using the Dual-channel 4Gb Fibre Channel PCI Express card? Is it 255, 512 or higher? I know it uses the ATTO driver, but I can't find any documentaiton about the upper limits of how many luns this HBA can address from a single target array on a SAN. Thanks.

Mac Pro, OS X Server

Posted on Aug 15, 2013 12:34 AM

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1 reply

Aug 21, 2013 5:34 AM in response to pabloasu

Hi,


The card should be an ATTO 42ES whcih supports 255 LUNS per channel


Here's the info from the attached link

Consider the following Celerity FC host adapter guidelines:

ATTO 4-Gb and 8-Gb FC cards (PCI-X and PCIe only) are supported. Latest HP-specific ATTO Celerity FC host adapter driver Latest HP-specific ATTO Configuration Tool A maximum of 256 targets per host adapter channel are supported. A maximum of 255 logical unit numbers (LUNs) per host adapter channel are supported. PowerPC- and Intel-based servers are supported.


http://www.attotech.com/pdfs/MacOSFCconnEVA5697-7653.pdf




Hope that helps

Beatle

How many luns does mac OSX support from a single target (array) is it 255??

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