Commit a3ec723a authored by Eric Piel's avatar Eric Piel Committed by James Bottomley
Browse files

[SCSI] Update wording of CONFIG_SCSI_MULTI_LUN help

I had to set CONFIG_SCSI_MULTI_LUN to y in order to get my SE W595
working when plugging it as a mass storage. Looking at SCSI option to
get a phone behaving correctly was convoluted to say the least. There
are quite a few other reports about USB card readers needing this option
as well. This patch improves the help text to make the use of the option
more obvious.

Signed-off-by: default avatarEric Piel <>
Signed-off-by: default avatarJames Bottomley <>
parent 16b3858e
......@@ -191,20 +191,19 @@ config SCSI_ENCLOSURE
it has an enclosure device. Selecting this option will just allow
certain enclosure conditions to be reported and is not required.
comment "Some SCSI devices (e.g. CD jukebox) support multiple LUNs"
depends on SCSI
bool "Probe all LUNs on each SCSI device"
depends on SCSI
If you have a SCSI device that supports more than one LUN (Logical
Unit Number), e.g. a CD jukebox, and only one LUN is detected, you
can say Y here to force the SCSI driver to probe for multiple LUNs.
A SCSI device with multiple LUNs acts logically like multiple SCSI
devices. The vast majority of SCSI devices have only one LUN, and
so most people can say N here. The max_luns boot/module parameter
allows to override this setting.
Some devices support more than one LUN (Logical Unit Number) in order
to allow access to several media, e.g. CD jukebox, USB card reader,
mobile phone in mass storage mode. This option forces the kernel to
probe for all LUNs by default. This setting can be overriden by
max_luns boot/module parameter. Note that this option does not affect
devices conforming to SCSI-3 or higher as they can explicitely report
their number of LUNs. It is safe to say Y here unless you have one of
those rare devices which reacts in an unexpected way when probed for
multiple LUNs.
bool "Verbose SCSI error reporting (kernel size +=12K)"
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