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.

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

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