Bug#830300: RE: Bug#830300: bug in mdadm

[Любен Каравелов]

----- Цитат от Michael Biebl (biebl at debian.org), на 16.07.2016 в 15:10 -----

> On Sat, 9 Jul 2016 19:47:07 +0300
> =?utf-8?B?0JvRjtCx0LXQvSDQmtCw0YDQsNCy0LXQu9C+0LI=?= <karavelov at mail.bg>
> wrote:
>> Hi,
>> 
>> The problem I am trying to solve is that my laptop (ASUS Zenbook UX301LAA) is using Intel RAID0 setup:
>> 
>> 00:1f.2 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller [RAID mode] (rev 04)
>> 
>> But it stopped working 5-6 months ago (3.3.2-5 was the last version that was working out of the box). My understanding is that for some reason mdadm is not recognizing the setup as being a IMSM RAID and I was forcing the RAID assembly to bypass this check with the envvars until this was also broken by the last mdadm update.
>> 
> 
> Have you filed a bug report back then?
> Seems to me that fixing the root cause is a better approach then keeping
> this workaround alive (and 3.4-2 out of testing).
> 
> Michael
> 

No, I have not. It seems that it's know that it misses
to detect some controllers:

http://marc.info/?l=linux-raid&m=143872588405500&w=2

The man page suggest upgrading the BIOS and I have done so
to the latest available version without any effect. 

BTW, here are the details of my controller:

~ # mdadm --detail-platform
       Platform : Intel(R) Rapid Storage Technology
        Version : 12.7.0.1936
    RAID Levels : raid0 raid1
    Chunk Sizes : 4k 8k 16k 32k 64k 128k
    2TB volumes : supported
      2TB disks : supported
      Max Disks : 6
    Max Volumes : 2 per array, 4 per controller
 I/O Controller : /sys/devices/pci0000:00/0000:00:1f.2 (SATA)
          Port0 : /dev/sda (135178400807)
          Port1 : /dev/sdb (135178400963)
          Port2 : - no device attached -
          Port3 : - no device attached -

~ # lspci -v
...
00:1f.2 RAID bus controller: Intel Corporation 82801 Mobile SATA Controller [RAID mode] (rev 04)
        Subsystem: ASUSTeK Computer Inc. 82801 Mobile SATA Controller [RAID mode]
        Flags: bus master, 66MHz, medium devsel, latency 0, IRQ 43
        I/O ports at f0b0 [size=8]
        I/O ports at f0a0 [size=4]
        I/O ports at f090 [size=8]
        I/O ports at f080 [size=4]
        I/O ports at f060 [size=32]
        Memory at f7d22000 (32-bit, non-prefetchable) [size=2K]
        Capabilities: [80] MSI: Enable+ Count=1/1 Maskable- 64bit-
        Capabilities: [70] Power Management version 3
        Capabilities: [a8] SATA HBA v1.0
        Kernel driver in use: ahci
        Kernel modules: ahci
...
~ # dmidecode
# dmidecode 3.0
Getting SMBIOS data from sysfs.
SMBIOS 2.7 present.
24 structures occupying 1689 bytes.
Table at 0xDAE7C018.

Handle 0x0000, DMI type 0, 24 bytes
BIOS Information
        Vendor: American Megatrends Inc.
        Version: UX301LAA.211
        Release Date: 06/05/2015
        Address: 0xF0000
        Runtime Size: 64 kB
        ROM Size: 6144 kB
        Characteristics:
                PCI is supported
                BIOS is upgradeable
                BIOS shadowing is allowed
                Boot from CD is supported
                Selectable boot is supported
                BIOS ROM is socketed
                EDD is supported
                5.25"/1.2 MB floppy services are supported (int 13h)
                3.5"/720 kB floppy services are supported (int 13h)
                3.5"/2.88 MB floppy services are supported (int 13h)
                Print screen service is supported (int 5h)
                8042 keyboard services are supported (int 9h)
                Serial services are supported (int 14h)
                Printer services are supported (int 17h)
                ACPI is supported
                USB legacy is supported
                Smart battery is supported
                BIOS boot specification is supported
                Targeted content distribution is supported
                UEFI is supported
        BIOS Revision: 4.6
...

and here is my mdadm.conf:

~ # cat /etc/mdadm/mdadm.conf                                                                                                                                    root at zenbook
# mdadm.conf
#
# Please refer to mdadm.conf(5) for information about this file.
#

# by default (built-in), scan all partitions (/proc/partitions) and all
# containers for MD superblocks. alternatively, specify devices to scan, using
# wildcards if desired.
#DEVICE partitions containers

# auto-create devices with Debian standard permissions
CREATE owner=root group=disk mode=0660 auto=yes

# automatically tag new arrays as belonging to the local system
HOMEHOST 

# instruct the monitoring daemon where to send mail alerts
MAILADDR root

# definitions of existing MD arrays
ARRAY metadata=imsm UUID=518b7355:90f15f1b:d74e62c6:e0c9c9da
ARRAY /dev/md/ASUS_OS container=518b7355:90f15f1b:d74e62c6:e0c9c9da member=0 UUID=6274cc4a:a22ed1d4:7a1173d6:f24c1fc7

# This file was auto-generated on Tue, 12 Aug 2014 21:01:58 -0700
# by mkconf 3.3-2


Thanks in advance,
luben