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Michael Neuffer writes: > On Sun, 11 Jan 1998, Richard Gooch wrote: > > > No not controllers. This is buses on the controller. 4 bits for this > > > should be the lower limit. The smallest SSA that you can buy from > > > SUN for example has already 6 buses. > > > > That's interesting. Since you seem to know something about SCSI host > > adapters with multiple SCSI buses, can you please tell us how they > > show that in /dev? I'm aware of the following format: > > > > cCtTdDsS > > > > where <C> is the controller number (host adaptor), <T> is the SCSI > > target (SCSI ID), <D> is the device number (LUN) and <S> is the stripe > > (partition). > > > > Where do they put the per-host/controller SCSI bus ID? > > Solaris resorts to an ugly trick to encode the buses of the SSAs. > When speaking to an SSA the LUN gets dropped and the fields shift > right to make room for the channel (bus). > > Now the meaning is follows: > > cCtBdTsS > > Where <C> is the controller, <B> is the bus/channel, <T> is the target and > <S> is the slice. > > This allows then to stay compatible with their naming sheme but has the > drawback of dropping support for LUNs. This only works properly for the > special case of the SSAs since you only have disk drives in them. > > However I do not think that we should make the same mistake as them > and cut ourselves off from supporting multi LUN devices. Agreed! Considering this, I'm open to alternative naming schemes, but only if they preserve the information. Regards, Richard.... | ||||||||||||
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