** Tags added: cherry-pick
** Changed in: linux-lts-trusty (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux-lts-trusty (Ubuntu)
Status: New => Triaged
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https://bugs.launchpad.net/bugs/1397590
Title:
storvsc attaches the same virtual HDD multiple times
Status in linux-lts-trusty package in Ubuntu:
Triaged
Bug description:
I'm using Ubuntu Server 14.04.1 LTS as client on Microsoft Hyper-V host which
is Windows Server 2008 R2 SP1 machine.
When upgrading kernel version from 3.13.0.36 to 3.13.0.37 I noticed that the
same SCSI virtual HDD is recognized multiple times and attached as separate
devices: sdb, sdc, sdd, ..., sdi.
Here is a piece of dmesg report when booting 3.13.0.37 kernel:
[ 6.118883] scsi 2:0:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.119282] sd 2:0:0:0: Attached scsi generic sg1 type 0
[ 6.119557] sd 2:0:0:0: [sda] 2097152 512-byte logical blocks: (1.07
GB/1.00 GiB)
[ 6.119756] sd 2:0:0:0: [sda] Write Protect is off
[ 6.119759] sd 2:0:0:0: [sda] Mode Sense: 0f 00 10 00
[ 6.119849] sd 2:0:0:0: [sda] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.120615] scsi3 : storvsc_host_t
[ 6.121012] scsi 3:0:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.122622] scsi scan: INQUIRY result too short (5), using 36
[ 6.123105] scsi scan: INQUIRY result too short (5), using 36
[ 6.123457] scsi 3:1:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.124657] hv_netvsc: hv_netvsc channel opened successfully
[ 6.124692] sda: sda1
[ 6.124750] scsi scan: INQUIRY result too short (5), using 36
[ 6.125775] scsi scan: INQUIRY result too short (5), using 36
[ 6.126111] scsi 3:2:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.126341] scsi scan: INQUIRY result too short (5), using 36
[ 6.126473] scsi scan: INQUIRY result too short (5), using 36
[ 6.126608] scsi 3:3:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.126668] sd 2:0:0:0: [sda] Attached SCSI disk
[ 6.126807] scsi scan: INQUIRY result too short (5), using 36
[ 6.126978] scsi scan: INQUIRY result too short (5), using 36
[ 6.127092] scsi 3:4:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.127281] scsi scan: INQUIRY result too short (5), using 36
[ 6.127382] scsi scan: INQUIRY result too short (5), using 36
[ 6.127499] scsi 3:5:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.127681] scsi scan: INQUIRY result too short (5), using 36
[ 6.127786] scsi scan: INQUIRY result too short (5), using 36
[ 6.127900] scsi 3:6:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.128076] scsi scan: INQUIRY result too short (5), using 36
[ 6.128180] scsi scan: INQUIRY result too short (5), using 36
[ 6.128299] scsi 3:7:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.128479] scsi scan: INQUIRY result too short (5), using 36
[ 6.128583] scsi scan: INQUIRY result too short (5), using 36
[ 6.129085] sd 3:0:0:0: Attached scsi generic sg2 type 0
[ 6.129321] sd 3:0:0:0: [sdb] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.129654] sd 3:1:0:0: Attached scsi generic sg3 type 0
[ 6.129901] sd 3:1:0:0: [sdc] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.130071] sd 3:2:0:0: Attached scsi generic sg4 type 0
[ 6.130167] sd 3:0:0:0: [sdb] Write Protect is off
[ 6.130171] sd 3:0:0:0: [sdb] Mode Sense: 0f 00 10 00
[ 6.130457] sd 3:3:0:0: Attached scsi generic sg5 type 0
[ 6.130707] sd 3:0:0:0: [sdb] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.130712] sd 3:1:0:0: [sdc] Write Protect is off
[ 6.130715] sd 3:1:0:0: [sdc] Mode Sense: 0f 00 10 00
[ 6.130926] sd 3:4:0:0: Attached scsi generic sg6 type 0
[ 6.131339] sd 3:1:0:0: [sdc] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.131662] sd 3:5:0:0: Attached scsi generic sg7 type 0
[ 6.131886] sd 3:6:0:0: Attached scsi generic sg8 type 0
[ 6.132000] sd 3:2:0:0: [sdd] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.132106] sd 3:7:0:0: Attached scsi generic sg9 type 0
[ 6.132640] sd 3:3:0:0: [sde] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.132903] sd 3:2:0:0: [sdd] Write Protect is off
[ 6.132907] sd 3:2:0:0: [sdd] Mode Sense: 0f 00 10 00
[ 6.133439] sd 3:2:0:0: [sdd] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.133661] sd 3:3:0:0: [sde] Write Protect is off
[ 6.133664] sd 3:3:0:0: [sde] Mode Sense: 0f 00 10 00
[ 6.133950] sd 3:4:0:0: [sdf] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.134218] sd 3:3:0:0: [sde] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.134658] sd 3:4:0:0: [sdf] Write Protect is off
[ 6.134661] sd 3:4:0:0: [sdf] Mode Sense: 0f 00 10 00
[ 6.135189] sd 3:4:0:0: [sdf] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.136335] sd 3:5:0:0: [sdg] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.136425] sd 3:6:0:0: [sdh] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.136580] sd 3:5:0:0: [sdg] Write Protect is off
[ 6.136584] sd 3:5:0:0: [sdg] Mode Sense: 0f 00 10 00
[ 6.136736] sd 3:5:0:0: [sdg] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.136743] sd 3:6:0:0: [sdh] Write Protect is off
[ 6.136747] sd 3:6:0:0: [sdh] Mode Sense: 0f 00 10 00
[ 6.137173] sd 3:6:0:0: [sdh] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.138982] sdb: sdb1 sdb2
[ 6.138986] sdc: sdc1 sdc2
[ 6.139185] sd 3:7:0:0: [sdi] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.139671] sd 3:7:0:0: [sdi] Write Protect is off
[ 6.139674] sd 3:7:0:0: [sdi] Mode Sense: 0f 00 10 00
[ 6.139828] sd 3:7:0:0: [sdi] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.140112] sd 3:0:0:0: [sdb] Attached SCSI disk
[ 6.140116] sd 3:1:0:0: [sdc] Attached SCSI disk
[ 6.147631] hv_netvsc vmbus_0_9: Device MAC 00:15:5d:01:36:03 link state up
[ 6.149689] sdg: sdg1 sdg2
[ 6.149742] sde: sde1 sde2
[ 6.149773] sdi: sdi1 sdi2
[ 6.150282] hv_netvsc: hv_netvsc channel opened successfully
[ 6.150413] sdf: sdf1 sdf2
[ 6.150448] sdh: sdh1 sdh2
[ 6.150835] sdd: sdd1 sdd2
[ 6.152237] sd 3:6:0:0: [sdh] Attached SCSI disk
[ 6.152276] sd 3:4:0:0: [sdf] Attached SCSI disk
[ 6.152371] sd 3:2:0:0: [sdd] Attached SCSI disk
[ 6.152517] sd 3:3:0:0: [sde] Attached SCSI disk
[ 6.152537] sd 3:5:0:0: [sdg] Attached SCSI disk
[ 6.152545] sd 3:7:0:0: [sdi] Attached SCSI disk
[ 6.204673] hv_netvsc vmbus_0_10: Device MAC 00:15:5d:01:36:04 link state
up
[ 6.229274] random: nonblocking pool is initialized
[ 6.400669] EXT4-fs (sdh2): mounted filesystem with ordered data mode.
Opts: (null)
Note, that I use two virtual HDDs: one IDE mounted as /boot and one
SCSI mounted as /. IDE HDD recognized correctly.
The same piece of dmesg when booting 3.13.0-36 kernel looks like:
[ 6.395402] scsi 2:0:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.396193] sd 2:0:0:0: [sda] 2097152 512-byte logical blocks: (1.07
GB/1.00 GiB)
[ 6.396404] sd 2:0:0:0: [sda] Write Protect is off
[ 6.396409] sd 2:0:0:0: [sda] Mode Sense: 0f 00 10 00
[ 6.396541] sd 2:0:0:0: [sda] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.396895] sd 2:0:0:0: Attached scsi generic sg1 type 0
[ 6.398751] hv_netvsc: hv_netvsc channel opened successfully
[ 6.399441] sda: sda1
[ 6.401185] sd 2:0:0:0: [sda] Attached SCSI disk
[ 6.423093] hv_netvsc vmbus_0_10: Device MAC 00:15:5d:01:36:04 link state
up
[ 6.425530] scsi3 : storvsc_host_t
[ 6.425954] scsi 3:0:0:0: Direct-Access Msft Virtual Disk 1.0
PQ: 0 ANSI: 4
[ 6.426243] sd 3:0:0:0: Attached scsi generic sg2 type 0
[ 6.426455] sd 3:0:0:0: [sdb] 266338304 512-byte logical blocks: (136
GB/127 GiB)
[ 6.426587] sd 3:0:0:0: [sdb] Write Protect is off
[ 6.426591] sd 3:0:0:0: [sdb] Mode Sense: 0f 00 10 00
[ 6.426680] sd 3:0:0:0: [sdb] Write cache: disabled, read cache: enabled,
supports DPO and FUA
[ 6.440294] sdb: sdb1 sdb2
[ 6.441930] sd 3:0:0:0: [sdb] Attached SCSI disk
[ 6.598784] EXT4-fs (sdb2): mounted filesystem with ordered data mode.
Opts: (null)
Complete dmesg files are in attachment.
I tried newer kernels - 3.13.0.40 and 3.16.0.25 with the same result. Also I
noticed that the same bug is present in Fedora 20.
The bug is not present if Hyper-V host is Windows 8 (except messages "INQUIRY
result too short").
Nevertheless, the system with this bug is bootable and workable. The
only problem I noticed is that update-grub recognizes Linux on each
attached extra virtual disk and creates unbootable grub.cfg.
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