On 14.09.2005 07:22 Sergey Panov <sipan@xxxxxxxxx> wrote: > On Tue, 2005-09-13 at 15:25 -0700, Patrick Mansfield wrote: > > I think the only HBA's today that can handle an 8 byte lun are lpfc and > > iscsi (plus new SAS ones). > I am not aware of any SCSI/FC/SAS/etc hardware which uses more then just > first two bytes, but all drivers I looked at to proper bytes > rearrangement for those two bytes, and, as a result they do support 00b > and 01b addressing modes. In certain configurations IBM's DS8000 uses 2nd level addressing with flat space addressing method (01b). Thus ending up with 8 byte LUNs where the first 4 bytes are really used, e.g. 40:ab:40:cd:00:00:00:00. This allows to address more than 0x3fff LUNs. But I don't know whether that many LUNs can be configured in practice. BTW, zfcp really handles 8 byte LUNs using "unsigned long long" on big (endian) iron ;-) (However LUNs have to be configured via sysfs - no LUN scanning supported at the moment ;-( Regards, Andreas - : send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
