new scsi hardware detection in 2.4.7(pre)

DISCUSSION Olaf Hering 3 participants 5 messages Jul 23, 2001 – Jul 30, 2001

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Olaf Hering

author

2001-07-23 15:10 UTC #0 lore raw

Hi,

I get this on non-scsi systems with scsi compiled into the kernel:

SCSI subsystem driver Revision: 1.00 request_module[scsi_hostadapter]: Root fs not mounted request_module[scsi_hostadapter]: Root fs not mounted request_module[scsi_hostadapter]: Root fs not mounted

iBook, PowerBook etc.

#
# SCSI support
#
CONFIG_SCSI=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
CONFIG_SD_EXTRA_DEVS=40
CONFIG_CHR_DEV_ST=m
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=y
CONFIG_BLK_DEV_SR_VENDOR=y
CONFIG_SR_EXTRA_DEVS=2
CONFIG_CHR_DEV_SG=y

#
# Some SCSI devices (e.g. CD jukebox) support multiple LUNs #
# CONFIG_SCSI_DEBUG_QUEUES is not set CONFIG_SCSI_MULTI_LUN=y
# CONFIG_SCSI_CONSTANTS is not set
# CONFIG_SCSI_LOGGING is not set

#
# SCSI low-level drivers
#
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_7000FASST is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AHA152X is not set
# CONFIG_SCSI_AHA1542 is not set
# CONFIG_SCSI_AHA1740 is not set
# CONFIG_SCSI_AACRAID is not set CONFIG_SCSI_AIC7XXX=y CONFIG_AIC7XXX_CMDS_PER_DEVICE=8 CONFIG_AIC7XXX_RESET_DELAY_MS=15000
# CONFIG_AIC7XXX_BUILD_FIRMWARE is not set
# CONFIG_SCSI_DPT_I2O is not set CONFIG_SCSI_ADVANSYS=m

Any ideas whats wrong here? I see that in all 2.4.7pre kernels.

Gruss Olaf

Signature · 4 lines

 $ man clone

BUGS
       Main feature not yet implemented...

Keith Owens

2001-07-24 02:00 UTC #1 lore raw

Quoted 6 lines · Olaf Hering

I get this on non-scsi systems with scsi compiled into the kernel:
SCSI subsystem driver Revision: 1.00 request_module[scsi_hostadapter]: Root fs not mounted request_module[scsi_hostadapter]: Root fs not mounted request_module[scsi_hostadapter]: Root fs not mounted

The SCSI midlayer is trying to load the SCSI host adapter, that is an unavoidable side effect of including SCSI support. Because no adapter is found, kmod tries to automatically load a module that can find a host adapter. The "Root fs not mounted" message occurs when you try to load any module before / is mounted.

Olaf Hering

author

2001-07-30 13:31 UTC #2 lore raw

In reply to Olaf Hering

Quoted 9 lines · Keith Owens

Quoted 6 lines · Olaf Hering
I get this on non-scsi systems with scsi compiled into the kernel:
SCSI subsystem driver Revision: 1.00 request_module[scsi_hostadapter]: Root fs not mounted request_module[scsi_hostadapter]: Root fs not mounted request_module[scsi_hostadapter]: Root fs not mounted

Quoted 5 lines

The SCSI midlayer is trying to load the SCSI host adapter, that is an unavoidable side effect of including SCSI support. Because no adapter is found, kmod tries to automatically load a module that can find a host adapter. The "Root fs not mounted" message occurs when you try to load any module before / is mounted.

Does that make any sense? I mean, there are some scsi drivers, none of them found a valid device, why do we look for more drivers? It would make sense if there are no low level device drivers in the kernel binary.

Gruss Olaf

Signature · 4 lines

 $ man clone

BUGS
       Main feature not yet implemented...

Keith Owens

2001-07-30 13:39 UTC #3 lore raw

Quoted 17 lines · Olaf Hering

Quoted 9 lines · Keith Owens
Quoted 6 lines · Olaf Hering
I get this on non-scsi systems with scsi compiled into the kernel:
SCSI subsystem driver Revision: 1.00 request_module[scsi_hostadapter]: Root fs not mounted request_module[scsi_hostadapter]: Root fs not mounted request_module[scsi_hostadapter]: Root fs not mounted
Quoted 5 lines
The SCSI midlayer is trying to load the SCSI host adapter, that is an unavoidable side effect of including SCSI support. Because no adapter is found, kmod tries to automatically load a module that can find a host adapter. The "Root fs not mounted" message occurs when you try to load any module before / is mounted.

Quoted 4 lines

Does that make any sense? I mean, there are some scsi drivers, none of them found a valid device, why do we look for more drivers? It would make sense if there are no low level device drivers in the kernel binary.

There is no way for the mid layer to distinguish between "no SCSI card configured into kernel" and "SCSI card configured but failed to detect hardware". Even when there is a card built into the kernel, it still makes sense to scan for modules if the initial card failed. That gives you fallback to modules when you change your hardware.

If you boot a SCSI kernel on a non-SCSI box then you should alias scsi_hostadapter off. You still get the 'Root fs not mounted' warning messages, just ignore them. If you are using one kernel build for lots of different hardware you should be using initrd, then the root fs messages go away as well.

majordomo kernel

2001-07-30 17:30 UTC #4 lore raw

It makes more sense if U can send a copy to SCSI group too.People like Eric and many others only looks at the linux-scsi group.I think by doing this U can cater to a wider group of people and more specifically this sort
of issues are relavant to both -kernel and scsi group. I hope and expect that in future this will be taken care of.
Thanx

Quoted 56 lines · --- Keith Owens

Quoted 5 lines · Olaf Hering
Quoted 3 lines · Keith Owens
Quoted 1 line · Olaf Hering
I get this on non-scsi systems with scsi
compiled into the kernel:
Quoted 3 lines
Quoted 3 lines
Quoted 3 lines
SCSI subsystem driver Revision: 1.00
request_module[scsi_hostadapter]: Root fs not
mounted
Quoted 1 line
Quoted 1 line
Quoted 1 line
request_module[scsi_hostadapter]: Root fs not
mounted
Quoted 1 line
Quoted 1 line
Quoted 1 line
request_module[scsi_hostadapter]: Root fs not
mounted
Quoted 2 lines
Quoted 2 lines
The SCSI midlayer is trying to load the SCSI host
adapter, that is an
Quoted 1 line
Quoted 1 line
unavoidable side effect of including SCSI
support. Because no adapter
Quoted 1 line
Quoted 1 line
is found, kmod tries to automatically load a
module that can find a
Quoted 1 line
Quoted 1 line
host adapter. The "Root fs not mounted" message
occurs when you try to
Quoted 3 lines
Quoted 1 line
load any module before / is mounted.
Does that make any sense? I mean, there are some
scsi drivers, none of
Quoted 1 line
them found a valid device, why do we look for more
drivers? It would
Quoted 1 line
make sense if there are no low level device drivers
in the kernel
Quoted 1 line
binary.
There is no way for the mid layer to distinguish between "no SCSI card
configured into kernel" and "SCSI card configured but failed to detect
hardware". Even when there is a card built into the kernel, it still
makes sense to scan for modules if the initial card failed. That gives
you fallback to modules when you change your hardware.
If you boot a SCSI kernel on a non-SCSI box then you should alias
scsi_hostadapter off. You still get the 'Root fs not mounted' warning
messages, just ignore them. If you are using one kernel build for lots
of different hardware you should be using initrd, then the root fs
messages go away as well.

Quoted 7 lines

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