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RE: ISW dmraid-rc15 fails to activate raid0 due to incorrect cylinder calculation



Hello Giuseppe,
ISW metadata blocks_per_member (dev->vol.map.blocks_per_member) shall contain journaling space on the RAID member device, while r->sectors shall contain data space only.
During RAID device configuration in metadata the journaling space is added to blocks_per_member:
	map->blocks_per_member = (map->blocks_per_strip * map->num_data_stripes) * div + RAID_DS_JOURNAL;


Could you please provide ISW native metadata output from dmraid -n and device mapper mapping (dmsetup table and status) and dmraid array configuration (dmraid -C and dmraid -s)?
Do you see 	"%s: zero sectors on %s"?
If not, possibly there is an overflow and the reason might be in blocks_per_member configuration.


Regards,
Marcin

> -----Original Message-----
> From: ataraid-list-bounces redhat com [mailto:ataraid-list-
> bounces redhat com] On Behalf Of Giuseppe Iuculano
> Sent: Sunday, April 19, 2009 12:42 PM
> To: ATARAID (eg, Promise Fasttrak, Highpoint 370) related discussions
> Cc: 524637-forwarded bugs debian org
> Subject: Re: ISW dmraid-rc15 fails to activate raid0 due to incorrect
> cylinder calculation
> 
> Hi,
> 
> Danny ha scritto:
> > Upon many attempts and comparisons to rc14 I discovered that
> > dmraid-rc15 calculates the number of cylinders incorrectly..
> 
> The relevant code in isw.c is:
> 
> if ((r->sectors = dev->vol.map.blocks_per_member - RAID_DS_JOURNAL))
> 
> But in dmraid rc14 was:
> 
> if ((r->sectors = dev->vol.map.blocks_per_member))
> 
> 
> What is the purpose of this change?
> 
> Cheers,
> Giuseppe.



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