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[Bug 1418339] [NEW] kernel set the wrong max_sectors_kb for 4K disks(sd.c)

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From: Launchpad Bug Tracker <1418339@xxxxxxxxxxxxxxxxxx>
Date: Thu, 05 Feb 2015 15:57:48 -0000
Reply-to: Bug 1418339 <1418339@xxxxxxxxxxxxxxxxxx>
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Problem Description
===========================
We get following error messages on the console and IO fails.

[   63.322503] sd 0:2:2:0: [sdc]
[   63.322603] Result: hostbyte=DID_ERROR driverbyte=DRIVER_SENSE
[   63.322661] sd 0:2:2:0: [sdc]
[   63.322697] Sense Key : Illegal Request [current]
[   63.322757] sd 0:2:2:0: [sdc]
[   63.322792] Add. Sense: Invalid field in cdb
[   63.322839] sd 0:2:2:0: [sdc] CDB:
[   63.322874] Write(10): 2a 00 03 02 17 a0 00 00 80 00
[   63.323038] blk_update_request: critical target error, dev sdc, sector 403750144
[   63.323117] sd 0:2:2:0: [sdc]
[   63.323152] Result: hostbyte=DID_ERROR driverbyte=DRIVER_SENSE
[   63.323210] sd 0:2:2:0: [sdc]
[   63.323245] Sense Key : Illegal Request [current]
[   63.323303] sd 0:2:2:0: [sdc]
[   63.323338] Add. Sense: Invalid field in cdb
[   63.323385] sd 0:2:2:0: [sdc] CDB:
[   63.323420] Write(10): 2a 00 03 02 17 20 00 00 80 00
[   63.323580] blk_update_request: critical target error, dev sdc, sector 403749120

[  138.410612] EXT4-fs warning (device dm-2): ext4_end_bio:317: I/O error -121 writing to inode 265776 (offset 0 size 393216 starting block 33920)
[  138.410727] Buffer I/O error on device dm-2, logical block 33920
[  138.410785] Buffer I/O error on device dm-2, logical block 33921
[  138.410842] Buffer I/O error on device dm-2, logical block 33922
[  138.410900] Buffer I/O error on device dm-2, logical block 33923
[  138.410957] Buffer I/O error on device dm-2, logical block 33924

 
---uname output---
Ubuntu 15.04
 
Machine Type = P8(Alpine) 
 

Steps to Reproduce
=====================
 read/write to a 4K array.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: architecture-ppc64le bot-comment bugnameltc-121259 severity-high targetmilestone-inin---
-- 
kernel set the wrong max_sectors_kb for 4K disks(sd.c)
https://bugs.launchpad.net/bugs/1418339
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