As I was recomended to send my question to this address, I do:
Re From: NeilBrown [off-list ref]
On Mon, May 15 2017, jan.weber@volny.cz wrote:
Sorry to interrupt you.
I'm sorry, but I don't provide private consulting for free.
Please post your question to linux-raid@vger.kernel.org
(you will need to make sure the email only contains text, no html
component).
NeilBrown
I need to assemble and get data from FakeRAID 5 originaly build on Windows 7 64 OS form 4 disk.
But the system failed, and I have to save the data. I cannot start the array neither with mdadm neither the dmraid.
The FakeRAID is managed by AMD RAID controller:
00:11.0 RAID bus controller: Advanced Micro Devices, Inc. [AMD/ATI] SB7x0/SB8x0/SB9x0 SATA Controller [RAID5 mode] (rev 40)
Subsystem: ASRock Incorporation SB7x0/SB8x0/SB9x0 SATA Controller [RAID5 mode]
Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
Latency: 32
Interrupt: pin A routed to IRQ 19
NUMA node: 0
Region 0: I/O ports at f040 [size=8]
Region 1: I/O ports at f030 [size=4]
Region 2: I/O ports at f020 [size=8]
Region 3: I/O ports at f010 [size=4]
Region 4: I/O ports at f000 [size=16]
Region 5: Memory at feb0b000 (32-bit, non-prefetchable) [size=1K]
Capabilities: [70] SATA HBA v1.0 InCfgSpace
Capabilities: [a4] PCI Advanced Features
AFCap: TP+ FLR+
AFCtrl: FLR-
AFStatus: TP-
Kernel driver in use: ahci
Kernel modules: ahci
The mdadm --examine /dev/sda [bcd] gives nothing,
but on the disks themselves, there is a 32256 byte area before the end of each disk
with some kind of “metadata” saying that the system is Promise Technology:
/dev/sda
2baa146e200 50 72 6f 6d 69 73 65 20 54 65 63 68 6e 6f 6c 6f |Promise Technolo|
2baa146e210 67 79 2c 20 49 6e 63 2e 00 00 02 00 87 a1 58 58 |gy, Inc.......XX|
2baa146e220 41 f6 00 00 87 a1 58 58 41 f6 01 01 00 d3 d2 d1 |A.....XXA.......|
2baa146e230 d0 cf ce cd cc cb ca c9 c8 c7 c6 c5 c4 c3 c2 c1 |................|
2baa146e240 c0 bf be bd bc bb ba b9 b8 b7 b6 b5 b4 b3 b2 b1 |................|
2baa146e250 b0 af ae ad ac ab aa a9 a8 a7 a6 a5 a4 a3 a2 a1 |................|
/dev/sdb
2baa146e200 50 72 6f 6d 69 73 65 20 54 65 63 68 6e 6f 6c 6f |Promise Technolo|
2baa146e210 67 79 2c 20 49 6e 63 2e 00 00 02 00 87 a1 58 58 |gy, Inc.......XX|
2baa146e220 34 f8 01 00 87 a1 58 58 34 f8 01 01 00 d3 d2 d1 |4.....XX4.......|
2baa146e230 d0 cf ce cd cc cb ca c9 c8 c7 c6 c5 c4 c3 c2 c1 |................|
2baa146e240 c0 bf be bd bc bb ba b9 b8 b7 b6 b5 b4 b3 b2 b1 |................|
2baa146e250 b0 af ae ad ac ab aa a9 a8 a7 a6 a5 a4 a3 a2 a1 |................|
/dev/sdc
2baa146e200 50 72 6f 6d 69 73 65 20 54 65 63 68 6e 6f 6c 6f |Promise Technolo|
2baa146e210 67 79 2c 20 49 6e 63 2e 00 00 02 00 88 a1 58 58 |gy, Inc.......XX|
2baa146e220 46 fa 02 00 88 a1 58 58 46 fa 01 01 00 d3 d2 d1 |F.....XXF.......|
2baa146e230 d0 cf ce cd cc cb ca c9 c8 c7 c6 c5 c4 c3 c2 c1 |................|
2baa146e240 c0 bf be bd bc bb ba b9 b8 b7 b6 b5 b4 b3 b2 b1 |................|
2baa146e250 b0 af ae ad ac ab aa a9 a8 a7 a6 a5 a4 a3 a2 a1 |................|
/dev/sdd
2baa146e200 50 72 6f 6d 69 73 65 20 54 65 63 68 6e 6f 6c 6f |Promise Technolo|
2baa146e210 67 79 2c 20 49 6e 63 2e 00 00 02 00 88 a1 58 58 |gy, Inc.......XX|
2baa146e220 59 fc 03 00 88 a1 58 58 59 fc 01 01 00 d3 d2 d1 |Y.....XXY.......|
2baa146e230 d0 cf ce cd cc cb ca c9 c8 c7 c6 c5 c4 c3 c2 c1 |................|
2baa146e240 c0 bf be bd bc bb ba b9 b8 b7 b6 b5 b4 b3 b2 b1 |................|
2baa146e250 b0 af ae ad ac ab aa a9 a8 a7 a6 a5 a4 a3 a2 a1 |................|
I have also found in that area the name of the array : “pole” :
/dev/sda
2baa146e440 07 02 01 00 25 01 f8 00 00 00 01 00 07 04 02 00 |....%...........|
2baa146e450 25 01 f9 00 00 00 02 00 07 06 03 00 25 01 fa 00 |%...........%...|
2baa146e460 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
2baa146e470 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
2baa146e490 00 00 00 00 70 6f 6c 65 00 00 00 00 00 00 00 00 |....pole........|
2baa146e4a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
2baa146e4d0 00 00 00 00 00 00 00 03 ff ff ff ff ff ff ff ff |................|
2baa146e4e0 01 01 01 00 00 00 01 00 04 00 00 00 00 08 00 00 |................|
2baa146e4f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
/dev/sdb
2baa146e440 07 02 01 00 25 01 f8 00 00 00 01 00 07 04 02 00 |....%...........|
2baa146e450 25 01 f9 00 00 00 02 00 07 06 03 00 25 01 fa 00 |%...........%...|
2baa146e460 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
2baa146e470 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
2baa146e490 00 00 00 00 70 6f 6c 65 00 00 00 00 00 00 00 00 |....pole........|
2baa146e4a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
2baa146e4d0 00 00 00 00 00 00 00 03 ff ff ff ff ff ff ff ff |................|
2baa146e4e0 01 01 01 00 00 00 01 00 04 00 00 00 00 08 00 00 |................|
2baa146e4f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
/dev/sdc
2baa146e440 07 02 01 00 25 01 f8 00 00 00 01 00 07 04 02 00 |....%...........|
2baa146e450 25 01 f9 00 00 00 02 00 07 06 03 00 25 01 fa 00 |%...........%...|
2baa146e460 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
2baa146e470 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
2baa146e490 00 00 00 00 70 6f 6c 65 00 00 00 00 00 00 00 00 |....pole........|
2baa146e4a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
2baa146e4d0 00 00 00 00 00 00 00 03 ff ff ff ff ff ff ff ff |................|
2baa146e4e0 01 01 01 00 00 00 01 00 04 00 00 00 00 08 00 00 |................|
2baa146e4f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
/dev/sdd
2baa146e440 07 02 01 00 25 01 f8 00 00 00 01 00 07 04 02 00 |....%...........|
2baa146e450 25 01 f9 00 00 00 02 00 07 06 03 00 25 01 fa 00 |%...........%...|
2baa146e460 00 00 03 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
2baa146e470 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
2baa146e490 00 00 00 00 70 6f 6c 65 00 00 00 00 00 00 00 00 |....pole........|
2baa146e4a0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
*
2baa146e4d0 00 00 00 00 00 00 00 03 ff ff ff ff ff ff ff ff |................|
2baa146e4e0 01 01 01 00 00 00 01 00 04 00 00 00 00 08 00 00 |................|
2baa146e4f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
Please, can be the mdadm forced to read the metadata form indicated area, or how can be this kind of FakeRAID accesed?
I was sucessful with various kind of “unrecognized” arrays telling the mdadm the guesed configuration
included the chunk size and raid level. But with this FakeRAID I can do nothing.
Thank for any answer
dr. Weber