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[dm-devel] Re: [PATCH] dm-striped device sizes must be multiple of chunk-size


    I am using the dmraid utility to detect and configure my Intel
Software Raid RAID0 array.  When upgrading to 2.6.16 from 2.6.15, the
system failed to boot because the device-mapper array was not built. 
I have traced the problem to this patch that limits dm-stripe to
targets that are multiples of the chunk size.  I don't know whether to
consider this a problem with device-mapper or with the Intel Software
Raid BIOS that built the array.  Dmraid is giving me a target of
980460038 blocks with a chunk size of 256 blocks.  Is this a problem
with device-mapper, the dmraid utility or the raid bios?  Should
device-mapper handle striped targets that are not multiples of the
chunk size?

Thank You,
Joe Yasi

dmesg gives these pertinent lines:
device-mapper: dm-stripe: Target length not divisible by chunk size.
device-mapper: error adding target to table.

dmsetup status
isw_caejhbcidd_Volume03: 0 976173660 linear
isw_caejhbcidd_Volume02: 0 4209030 linear
isw_caejhbcidd_Volume01: 0 64197 linear
isw_caejhbcidd_Volume0: 0 980460038 striped

dmraid -s
*** Group superset isw_caejhbcidd
--> Active Subset
name   : isw_caejhbcidd_Volume0
size   : 980460038
stride : 256
type   : stripe
status : ok
subsets: 0
devs   : 2
spares : 0

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