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Date:      Wed, 1 Jun 2011 09:26:05 +0000
From:      Holger Kipp <Holger.Kipp@alogis.com>
To:        Jeremy Chadwick <freebsd@jdc.parodius.com>
Cc:        "stable@freebsd.org" <stable@freebsd.org>, "mav@freebsd.org" <mav@freebsd.org>
Subject:   RE: 8-STABLE won't boot with ZFSv28
Message-ID:  <814C9E9472FDCC40AAC3FC95A2D67E3B0BD88DC0@msx3.exchange.alogis.com>
In-Reply-To: <20110601085454.GA19434@icarus.home.lan>
References:  <814C9E9472FDCC40AAC3FC95A2D67E3B0BD88C69@msx3.exchange.alogis.com>, <20110601085454.GA19434@icarus.home.lan>

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Jeremy Chadwick [freebsd@jdc.parodius.com] wrote on 01 June 2011 10:54

>On Wed, Jun 01, 2011 at 08:23:19AM +0000, Holger Kipp wrote:
>> I have a very irritating problem with 8-STABLE and ZFSv28
>>
>> I upgraded to 8-STABLE as of yesterday (31.05.2011),
>> downloaded stable-8-zfsv28-20110521.patch.xz
>> and applied the patch using
>>
>> cd /usr/src
>> patch -E -p0 < /path/to/patchfile
>> make buildworld
>> make buildkernel KERNCONF=3Dfoo
>> make installkernel KERNCONF=3Dfoo
>> make installworld
>> mergemaster
>>
>> which all went smoothly.
>>
>> After reboot, I only got
>> unknown: WARNING - ATAPI_IDENTITFY requeued due to channel reset LBA=3D0
>> all the time, and then after an hour or so (wasn't on site),
>> system gave
>> Fatal trap 12: page fault while in kernel mode
>> cupid - 0; apic id =3D 00
>> fault virtual address =3D 0x8
>> fault code                       =3D supervisor read data, page not pres=
ent
>> instruction pointer    =3D 0x20:0xffffffff80252301
>> stack poiner                   =3D 0x28:0xffffff80000a7ac0
>> frame pointer                =3D 0x28:0xffffff80000a7b00
>> code segment                =3D base 0x0, limit 0xfffff, type 0x1b
>>                                                =3D DPL 0, pres1, long 1,=
 def32 0, gran 1
>> processor eflags         =3D interrupt enabled, resume, IOPL =3D 0
>> current process           =3D 0 (thread taskq)trap number               =
=3D 12
>> panic: page fault
>> cpuid =3D 0
>> Uptime: 1h0m13s
>> Cannot dump. Device not defined or unavailable.
>> Automatic reboot in 15 seconds - press a key on the console to abort
>>
>> Needless to say the system did not reboot. Had to powercycle.
>>
>> Then always got the
>> unknown: WARNING - ATAPI_IDENTITFY requeued due to channel reset LBA=3D0
>> error about once per second.
>>
>> Have now used a fixit-disk to change back to the old kernel:
>> FreeBSD 8.2-STABLE #12: Mon Apr 18 12:48:56 CEST 2011
>> and rebootet.
>> Now zfs claims to be v28, current storage pool is at 15.I'd love to
>> try ZFSv28, but with the old kernel I don't think
>> this is a good idea - but with the new kernel it seems I can't
>> even boot properly.
>> Any suggestions as to how to proceed?

> I think this is much more likely related to an ATA/ATAPI-related change
> that was committed on April 17th recently and is not related to ZFSv28.
> Please see this thread:
>
> * 2011/05/29 -- ICH9 panic/instability on recent kernel
>   http://lists.freebsd.org/pipermail/freebsd-stable/2011-May/thread.html#=
62804
>
> Holger, can you please provide the following two things?
>
> 1) Output from "pciconf -lvcb".

That's an easy one:

hostb0@pci0:0:0:0:      class=3D0x060000 card=3D0xd28015d9 chip=3D0x29f0808=
6 rev=3D0x01 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '3200 Chipset (Bearlake) Processor to I/O Controller'
    class      =3D bridge
    subclass   =3D HOST-PCI
    cap 09[e0] =3D vendor (length 12) Intel cap 9 version 1
pcib1@pci0:0:1:0:       class=3D0x060400 card=3D0xd28015d9 chip=3D0x29f1808=
6 rev=3D0x01 hdr=3D0x01
    vendor     =3D 'Intel Corporation'
    device     =3D '3200 Chipset (Bearlake) PCIe Root Port 1'
    class      =3D bridge
    subclass   =3D PCI-PCI
    cap 0d[88] =3D PCI Bridge card=3D0xd28015d9
    cap 01[80] =3D powerspec 3  supports D0 D3  current D0
    cap 05[90] =3D MSI supports 1 message
    cap 10[a0] =3D PCI-Express 2 root port max data 128(128) link x8(x16)
ecap 0002[100] =3D VC 1 max VC0
ecap 0005[140] =3D unknown 1
uhci0@pci0:0:26:0:      class=3D0x0c0300 card=3D0xd28015d9 chip=3D0x2937808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) USB Universal Host Controll=
er'
    class      =3D serial bus
    subclass   =3D USB
    bar   [20] =3D type I/O Port, range 32, base 0x1820, size 32, enabled
    cap 13[50] =3D PCI Advanced Features: FLR TP
uhci1@pci0:0:26:1:      class=3D0x0c0300 card=3D0xd28015d9 chip=3D0x2938808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) USB Universal Host Controll=
er'
    class      =3D serial bus
    subclass   =3D USB
    bar   [20] =3D type I/O Port, range 32, base 0x1840, size 32, enabled
    cap 13[50] =3D PCI Advanced Features: FLR TP
uhci2@pci0:0:26:2:      class=3D0x0c0300 card=3D0xd28015d9 chip=3D0x2939808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) USB Universal Host Controll=
er'
    class      =3D serial bus
    subclass   =3D USB
    bar   [20] =3D type I/O Port, range 32, base 0x1860, size 32, enabled
    cap 13[50] =3D PCI Advanced Features: FLR TP
ehci0@pci0:0:26:7:      class=3D0x0c0320 card=3D0xd28015d9 chip=3D0x293c808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) USB2 Enhanced Host Controll=
er'
    class      =3D serial bus
    subclass   =3D USB
    bar   [10] =3D type Memory, range 32, base 0xd9001000, size 1024, enabl=
ed
    cap 01[50] =3D powerspec 2  supports D0 D3  current D0
    cap 0a[58] =3D EHCI Debug Port at offset 0xa0 in map 0x14
    cap 13[98] =3D PCI Advanced Features: FLR TP
pcib4@pci0:0:28:0:      class=3D0x060400 card=3D0xd28015d9 chip=3D0x2940808=
6 rev=3D0x02 hdr=3D0x01
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) PCIe Root Port 1'
    class      =3D bridge
    subclass   =3D PCI-PCI
    cap 10[40] =3D PCI-Express 1 root port max data 128(128) link x4(x4)
    cap 05[80] =3D MSI supports 1 message
    cap 0d[90] =3D PCI Bridge card=3D0xd28015d9
    cap 01[a0] =3D powerspec 2  supports D0 D3  current D0
ecap 0002[100] =3D VC 1 max VC0
ecap 0005[180] =3D unknown 1
pcib5@pci0:0:28:4:      class=3D0x060400 card=3D0xd28015d9 chip=3D0x2948808=
6 rev=3D0x02 hdr=3D0x01
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) PCIe Root Port 5'
    class      =3D bridge
    subclass   =3D PCI-PCI
    cap 10[40] =3D PCI-Express 1 root port max data 128(128) link x1(x1)
    cap 05[80] =3D MSI supports 1 message
    cap 0d[90] =3D PCI Bridge card=3D0xd28015d9
    cap 01[a0] =3D powerspec 2  supports D0 D3  current D0
ecap 0002[100] =3D VC 1 max VC0
ecap 0005[180] =3D unknown 1
pcib6@pci0:0:28:5:      class=3D0x060400 card=3D0xd28015d9 chip=3D0x294a808=
6 rev=3D0x02 hdr=3D0x01
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) PCIe Root Port 6'
    class      =3D bridge
    subclass   =3D PCI-PCI
    cap 10[40] =3D PCI-Express 1 root port max data 128(128) link x1(x1)
    cap 05[80] =3D MSI supports 1 message
    cap 0d[90] =3D PCI Bridge card=3D0xd28015d9
    cap 01[a0] =3D powerspec 2  supports D0 D3  current D0
ecap 0002[100] =3D VC 1 max VC0
ecap 0005[180] =3D unknown 1
uhci3@pci0:0:29:0:      class=3D0x0c0300 card=3D0xd28015d9 chip=3D0x2934808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) USB Universal Host Controll=
er'
    class      =3D serial bus
    subclass   =3D USB
    bar   [20] =3D type I/O Port, range 32, base 0x1880, size 32, enabled
    cap 13[50] =3D PCI Advanced Features: FLR TP
uhci4@pci0:0:29:1:      class=3D0x0c0300 card=3D0xd28015d9 chip=3D0x2935808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) USB Universal Host Controll=
er'
    class      =3D serial bus
    subclass   =3D USB
    bar   [20] =3D type I/O Port, range 32, base 0x18a0, size 32, enabled
    cap 13[50] =3D PCI Advanced Features: FLR TP
uhci5@pci0:0:29:2:      class=3D0x0c0300 card=3D0xd28015d9 chip=3D0x2936808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) USB Universal Host Controll=
er'
    class      =3D serial bus
    subclass   =3D USB
    bar   [20] =3D type I/O Port, range 32, base 0x18c0, size 32, enabled
    cap 13[50] =3D PCI Advanced Features: FLR TP
ehci1@pci0:0:29:7:      class=3D0x0c0320 card=3D0xd28015d9 chip=3D0x293a808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) USB2 Enhanced Host Controll=
er'
    class      =3D serial bus
    subclass   =3D USB
    bar   [10] =3D type Memory, range 32, base 0xd9001400, size 1024, enabl=
ed
    cap 01[50] =3D powerspec 2  supports D0 D3  current D0
    cap 0a[58] =3D EHCI Debug Port at offset 0xa0 in map 0x14
    cap 13[98] =3D PCI Advanced Features: FLR TP
pcib7@pci0:0:30:0:      class=3D0x060401 card=3D0xd28015d9 chip=3D0x244e808=
6 rev=3D0x92 hdr=3D0x01
    vendor     =3D 'Intel Corporation'
    device     =3D '82801 Family (ICH2/3/4/5/6/7/8/9,63xxESB) Hub Interface=
 to PCI Bridge'
    class      =3D bridge
    subclass   =3D PCI-PCI
    cap 0d[50] =3D PCI Bridge card=3D0xd28015d9
isab0@pci0:0:31:0:      class=3D0x060100 card=3D0xd28015d9 chip=3D0x2916808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IR (ICH9R) LPC Interface Controller'
    class      =3D bridge
    subclass   =3D PCI-ISA
    cap 09[e0] =3D vendor (length 12) Intel cap 1 version 0
                 features: SATA RAID-5, 4 PCI-e x1 slots
atapci0@pci0:0:31:2:    class=3D0x01018a card=3D0xd28015d9 chip=3D0x2920808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) 4 port Serial ATA Storage C=
ontroller 1'
    class      =3D mass storage
    subclass   =3D ATA
    bar   [10] =3D type I/O Port, range 32, base 0x1f0, size  8, enabled
    bar   [14] =3D type I/O Port, range 32, base 0x3f4, size  1, enabled
    bar   [18] =3D type I/O Port, range 32, base 0x170, size  8, enabled
    bar   [1c] =3D type I/O Port, range 32, base 0x374, size  1, enabled
    bar   [20] =3D type I/O Port, range 32, base 0x1c10, size 16, enabled
    bar   [24] =3D type I/O Port, range 32, base 0x1c00, size 16, enabled
    cap 01[70] =3D powerspec 3  supports D0 D3  current D0
    cap 13[b0] =3D PCI Advanced Features: FLR TP
none0@pci0:0:31:3:      class=3D0x0c0500 card=3D0xd28015d9 chip=3D0x2930808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D 'Intel(R) ICH9 Family SMBus Controller working fine with=
 http://download.cnet.com/Chipset-Driver-Inte (8086)'
    class      =3D serial bus
    subclass   =3D SMBus
    bar   [10] =3D type Memory, range 64, base 0xd9001800, size 256, enable=
d
    bar   [20] =3D type I/O Port, range 32, base 0x1100, size 32, enabled
atapci1@pci0:0:31:5:    class=3D0x010185 card=3D0xd28015d9 chip=3D0x2926808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) 2 port Serial ATA Storage C=
ontroller 2'
    class      =3D mass storage
    subclass   =3D ATA
    bar   [10] =3D type I/O Port, range 32, base 0x1c68, size  8, enabled
    bar   [14] =3D type I/O Port, range 32, base 0x1c5c, size  4, enabled
    bar   [18] =3D type I/O Port, range 32, base 0x1c60, size  8, enabled
    bar   [1c] =3D type I/O Port, range 32, base 0x1c58, size  4, enabled
    bar   [20] =3D type I/O Port, range 32, base 0x1c30, size 16, enabled
    bar   [24] =3D type I/O Port, range 32, base 0x1c20, size 16, enabled
    cap 01[70] =3D powerspec 3  supports D0 D3  current D0
    cap 13[b0] =3D PCI Advanced Features: FLR TP
none1@pci0:0:31:6:      class=3D0x118000 card=3D0x000015d9 chip=3D0x2932808=
6 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '82801IB/IR/IH (ICH9 Family) Thermal Subsystem'
    class      =3D dasp
    bar   [10] =3D type Memory, range 64, base 0xd9000000, size 4096, enabl=
ed
    cap 01[50] =3D powerspec 3  supports D0 D3  current D0
pcib2@pci0:1:0:0:       class=3D0x060400 card=3D0x00000000 chip=3D0x0329808=
6 rev=3D0x09 hdr=3D0x01
    vendor     =3D 'Intel Corporation'
    device     =3D 'PCI Express-to-PCI Express Bridge A (6700PXH)'
    class      =3D bridge
    subclass   =3D PCI-PCI
    cap 10[44] =3D PCI-Express 1 PCI bridge max data 128(256) link x8(x8)
    cap 05[5c] =3D MSI supports 1 message, 64 bit
    cap 01[6c] =3D powerspec 2  supports D0 D3  current D0
    cap 07[d8] =3D PCI-X bridge
ecap 0001[100] =3D AER 1 0 fatal 1 non-fatal 0 corrected
ecap 0004[300] =3D unknown 1
ioapic0@pci0:1:0:1:     class=3D0x080020 card=3D0xd28015d9 chip=3D0x0326808=
6 rev=3D0x09 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D '6700/6702PXH I/OxAPIC Interrupt Controller A'
    class      =3D base peripheral
    subclass   =3D interrupt controller
    bar   [10] =3D type Memory, range 32, base 0xd8900000, size 4096, enabl=
ed
    cap 10[44] =3D PCI-Express 1 endpoint max data 256(256) link x8(x8)
    cap 01[6c] =3D powerspec 2  supports D0 D3  current D0
pcib3@pci0:1:0:2:       class=3D0x060400 card=3D0x00000000 chip=3D0x032a808=
6 rev=3D0x09 hdr=3D0x01
    vendor     =3D 'Intel Corporation'
    device     =3D 'PCI Express-to-PCI Express Bridge B (6700PXH)'
    class      =3D bridge
    subclass   =3D PCI-PCI
    cap 10[44] =3D PCI-Express 1 PCI bridge max data 128(256) link x8(x8)
    cap 05[5c] =3D MSI supports 1 message, 64 bit
    cap 01[6c] =3D powerspec 2  supports D0 D3  current D0
    cap 07[d8] =3D PCI-X bridge
ecap 0001[100] =3D AER 1 0 fatal 1 non-fatal 0 corrected
ecap 0004[300] =3D unknown 1
ioapic1@pci0:1:0:3:     class=3D0x080020 card=3D0xd28015d9 chip=3D0x0327808=
6 rev=3D0x09 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D 'I/OxAPIC Interrupt Controller B (6700PXH)'
    class      =3D base peripheral
    subclass   =3D interrupt controller
    bar   [10] =3D type Memory, range 32, base 0xd8901000, size 4096, enabl=
ed
    cap 10[44] =3D PCI-Express 1 endpoint max data 256(256) link x8(x8)
    cap 01[6c] =3D powerspec 2  supports D0 D3  current D0
twe0@pci0:2:1:0:        class=3D0x010400 card=3D0x100113c1 chip=3D0x100113c=
1 rev=3D0x01 hdr=3D0x00
    vendor     =3D '3ware Inc'
    device     =3D 'ATA-133 Storage Controller (7000/8000 series)'
    class      =3D mass storage
    subclass   =3D RAID
    bar   [10] =3D type I/O Port, range 32, base 0x2000, size 16, enabled
    bar   [14] =3D type Memory, range 32, base 0xd8800000, size 16, enabled
    bar   [18] =3D type Memory, range 32, base 0xd8000000, size 8388608, en=
abled
    cap 01[40] =3D powerspec 1  supports D0 D1 D3  current D0
isp0@pci0:5:0:0:        class=3D0x0c0400 card=3D0x01371077 chip=3D0x2432107=
7 rev=3D0x03 hdr=3D0x00
    vendor     =3D 'QLogic Corporation'
    device     =3D 'Dual Channel 4G PCIe Fibre Channel Adapter (ISP2432)'
    class      =3D serial bus
    subclass   =3D Fibre Channel
    bar   [10] =3D type I/O Port, range 32, base 0x3000, size 256, enabled
    bar   [14] =3D type Memory, range 64, base 0xd8b00000, size 16384, enab=
led
    cap 01[44] =3D powerspec 2  supports D0 D3  current D0
    cap 10[4c] =3D PCI-Express 1 endpoint max data 128(1024) link x4(x4)
    cap 05[64] =3D MSI supports 16 messages, 64 bit enabled with 1 message
    cap 03[74] =3D VPD
    cap 11[7c] =3D MSI-X supports 16 messages in map 0x14
ecap 0001[100] =3D AER 1 0 fatal 1 non-fatal 0 corrected
ecap 0004[138] =3D unknown 1
em0@pci0:13:0:0:        class=3D0x020000 card=3D0x108c15d9 chip=3D0x108c808=
6 rev=3D0x03 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D 'Intel Corporation 82573E Gigabit Ethernet Controller (C=
opper) (82573E)'
    class      =3D network
    subclass   =3D ethernet
    bar   [10] =3D type Memory, range 32, base 0xd8a00000, size 131072, ena=
bled
    bar   [18] =3D type I/O Port, range 32, base 0x4000, size 32, enabled
    cap 01[c8] =3D powerspec 2  supports D0 D3  current D0
    cap 05[d0] =3D MSI supports 1 message, 64 bit enabled with 1 message
    cap 10[e0] =3D PCI-Express 1 endpoint max data 128(256) link x1(x1)
ecap 0001[100] =3D AER 1 0 fatal 1 non-fatal 0 corrected
ecap 0003[140] =3D Serial 1 003048ffffd21aba
em1@pci0:15:0:0:        class=3D0x020000 card=3D0x109a15d9 chip=3D0x109a808=
6 rev=3D0x00 hdr=3D0x00
    vendor     =3D 'Intel Corporation'
    device     =3D 'Intel PRO/1000 PL Network Adaptor (82573L)'
    class      =3D network
    subclass   =3D ethernet
    bar   [10] =3D type Memory, range 32, base 0xd8c00000, size 131072, ena=
bled
    bar   [18] =3D type I/O Port, range 32, base 0x5000, size 32, enabled
    cap 01[c8] =3D powerspec 2  supports D0 D3  current D0
    cap 05[d0] =3D MSI supports 1 message, 64 bit enabled with 1 message
    cap 10[e0] =3D PCI-Express 1 endpoint max data 128(256) link x1(x1)
ecap 0001[100] =3D AER 1 0 fatal 1 non-fatal 0 corrected
ecap 0003[140] =3D Serial 1 003048ffffd21abb
vgapci0@pci0:17:4:0:    class=3D0x030000 card=3D0xd28015d9 chip=3D0x515e100=
2 rev=3D0x02 hdr=3D0x00
    vendor     =3D 'ATI Technologies Inc. / Advanced Micro Devices, Inc.'
    device     =3D 'Radeon ES1000 (Radeon ES1000)'
    class      =3D display
    subclass   =3D VGA
    bar   [10] =3D type Prefetchable Memory, range 32, base 0xd0000000, siz=
e 134217728, enabled
    bar   [14] =3D type I/O Port, range 32, base 0x6000, size 256, enabled
    bar   [18] =3D type Memory, range 32, base 0xd8d00000, size 65536, enab=
led
    cap 01[50] =3D powerspec 2  supports D0 D1 D2 D3  current D0


> 2) Full output from a verbose boot (option "5" at the loader prompt).

That's a bit more difficult... I'll check, but don't think anything is set =
up
there to get a meaningful dump or verbose boot information in electronic fo=
rm...

> I imagine #2 isn't going to work for most users because there's no way
> to get pages and pages and pages of data from a panic'd machine without
> either serial console (which will require a 2nd machine and possibly a
> null-modem cable) or properly setting up a dedicated swap partition and
> large-enough /var filesystem, plus their kernel would need DDB support
> added to it (so they could properly do "call doadump" then "reboot").

> A workaround which one user has confirmed is to enable AHCI for your
> SATA controller in your system BIOS (if such is available).  ataahci.ko
> will be used (which is AHCI via ATA) and your device names probably
> won't change.  Alternatively you could enable AHCI and use ahci.ko
> (ahci_load=3D"yes" in /boot/loader.conf) to get AHCI via CAM, which
> provides NCQ and other features, but your device names will change.
> My familiarity with ATAPI is limited however.

Will try both if available and let you know the results.

> CC'ing mav@ here.
>
> Alexander, Holger's report looks exactly like Michael's report.
>
> Possibly we should consider reverting the April 17th commit until we can
> figure out what's going on here.

Many thanks for your support!

Best regards,
Holger


--
Holger Kipp
Diplom-Mathematiker
Senior Consultant

Tel. : +49 30 436 58 114
Fax. : +49 30 436 58 214
Mobil: +49 178 36 58 114
Email: holger.kipp@alogis.com

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D-10559 Berlin

web : http://www.alogis.com

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alogis AG
Sitz/Registergericht: Berlin/AG Charlottenburg, HRB 71484
Vorstand: Arne Friedrichs, Joern Samuelson
Aufsichtsratsvorsitzender: Reinhard Mielke



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