From mboxrd@z Thu Jan 1 00:00:00 1970
From: bugzilla-daemon@bugzilla.kernel.org
Subject: [Bug 13143] scsi_debug doesn't manage more than 1Tb
Date: Fri, 24 Apr 2009 18:27:30 GMT
Message-ID: <200904241827.n3OIRUvx030882@demeter.kernel.org>
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http://bugzilla.kernel.org/show_bug.cgi?id=13143
--- Comment #2 from Anonymous Emailer 2009-04-24 18:25:45 ---
Reply-To: dgilbert@interlog.com
FUJITA Tomonori wrote:
> On Tue, 21 Apr 2009 16:07:08 GMT
> bugzilla-daemon@bugzilla.kernel.org wrote:
>
>> http://bugzilla.kernel.org/show_bug.cgi?id=13143
>>
>> Summary: scsi_debug doesn't manage more than 1Tb
>> Product: SCSI Drivers
>> Version: 2.5
>> Platform: All
>> OS/Version: Linux
>> Tree: Mainline
>> Status: NEW
>> Severity: normal
>> Priority: P1
>> Component: Other
>> AssignedTo: scsi_drivers-other@kernel-bugs.osdl.org
>> ReportedBy: tvignaud@mandriva.com
>> Regression: No
>>
>>
>> While debugging a partitionner software that has issues with disks bigger than
>> 1Tb, I found out that scsi_debug doesn't manage more than 1Tb:
>>
>> # modprobe scsi_debug virtual_gb=1000
>> # cat /proc/partitions |fgrep sdc
>> 8 32 1048576000 sdc
>> # rmmod scsi_debug
>> # modprobe scsi_debug virtual_gb=1100
>> # cat /proc/partitions |fgrep sdc
>> 8 32 9223372035860725760 sdc
>>
>>
>> dmesg shows that the additionnal 100Gb makes it loose sight:
>> sd 16:0:0:0: [sdc] 2097152000 512-byte hardware sectors: (1.07 TB/1000 GiB)
>> versus:
>> sd 15:0:0:0: [sdc] 18446744071721451520 512-byte hardware sectors: (18.4
>> EB/15.9 EiB)
>
>
> =
> From: FUJITA Tomonori
> Subject: [PATCH] scsi_debug: fix virtual disk larger than 1TB
>
> Signed-off-by: FUJITA Tomonori
Signed-off-by: Douglas Gilbert
Wow, a 1 TB ram disk!
> ---
> drivers/scsi/scsi_debug.c | 2 +-
> 1 files changed, 1 insertions(+), 1 deletions(-)
>
> diff --git a/drivers/scsi/scsi_debug.c b/drivers/scsi/scsi_debug.c
> index 213123b..41a2177 100644
> --- a/drivers/scsi/scsi_debug.c
> +++ b/drivers/scsi/scsi_debug.c
> @@ -887,7 +887,7 @@ static int resp_start_stop(struct scsi_cmnd * scp,
> static sector_t get_sdebug_capacity(void)
> {
> if (scsi_debug_virtual_gb > 0)
> - return 2048 * 1024 * scsi_debug_virtual_gb;
> + return 2048 * 1024 * (sector_t)scsi_debug_virtual_gb;
> else
> return sdebug_store_sectors;
> }
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