READYNAS RN102 OS6 bloque apres upgrade firmware 6.10.6=>6.10.7

Bonjour,
le NAS ne redemarre plus depuis la mise à jour du dernier firmware.
connecté en serie j'ai les infos ci dessous :
je vois 2 erreurs :

[ 3.431061] Initramfs unpacking failed: unexpected EOF

[ 4.434078] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
les essais usb recovery 
ou bootmenu osreinstall ou factory reset ne donnent rien
merci d'avance pour vos conseils
----

General initialization - Version: 1.0.0

High speed PHY - Version: 2.1.4 (COM-PHY-V20)
Update PEX Device ID 0x6710
High speed PHY - Ended Successfully
0001
DDR3 Training Sequence - Ver 5.7.1
DDR3 Training Sequence - Run without PBS.
DDR3 Training Sequence - Ended Successfully
BootROM: Image checksum verification PASSED

__ __ _ _
| \/ | __ _ _ ____ _____| | |
| |\/| |/ _` | '__\ \ / / _ \ | |
| | | | (_| | | \ V / __/ | |
|_| |_|\__,_|_| \_/ \___|_|_|
_ _ ____ _
| | | | | __ ) ___ ___ | |_
| | | |___| _ \ / _ \ / _ \| __|
| |_| |___| |_) | (_) | (_) | |_
\___/ |____/ \___/ \___/ \__|
** LOADER **

U-Boot 2011.12-gec25d27-dirty (Oct 26 2015 - 16:53:05) Marvell version: v2011.12 2014_T2.0p1
06/23/2015 ReadyNAS-102 V2.0

Board: DB-88F6710-BP
SoC: MV6710 A1
CPU: Marvell PJ4B v7 UP (Rev 1) LE
CPU @ 1200 [MHz]
L2 @ 600 [MHz]
TClock @ 200 [MHz]
DDR @ 600 [MHz]
DDR 16Bit Width, FastPath Memory Access
DRAM: 512 MiB

Map: Code: 0x1feef000:0x1ff9ef34
BSS: 0x1ffef0a0
Stack: 0x1f9eeef8
Heap: 0x1f9ef000:0x1feef000

NAND: (ID 0xf1ad) 128 MiB
MMC: MRVL_MMC: 0
Bad block table found at page 65472, version 0x01
Bad block table found at page 65408, version 0x01
nand_read_bbt: Bad block at 0x000000060000
nand_read_bbt: Bad block at 0x000006bc0000

Initialize and scan all PCI interfaces
PEX unit.port(active IF[-first bus]):
------------------------------------------
PEX 0: Root Complex Interface, Detected Link X1, GEN 2.0
PEX 1: Root Complex Interface, Detected Link X1, GEN 2.0
FPU not initialized
USB 0: Host Mode
USB 1: Host Mode
Shutting down unused interfaces:
GBE0
SDIO
AUDIO
TDM
Modules/Interfaces Detected:
RGMII1 Phy
PEX0 (Lane 0)
PEX1 (Lane 1)
SATA0 (Lane 2)
SATA1 (Lane 3)
Net: , egiga1 [PRIME]
Power On!

FDT loaded successfully
Saving Environment to NAND...
Erasing Nand...
Writing to Nand... done
Enter Bootmenu...
Bootmenu : NORMAL
Bootmenu : FACTORY_DEFAULT
Bootmenu : OS_REINSTALL
Bootmenu : TECH_SUPPORT
Bootmenu : VOL_RO
Hit any key to stop autoboot: 0

NAND read: device 0 offset 0x200000, size 0x400000
4194304 bytes read: OK

NAND read: device 0 offset 0x800000, size 0x400000
4194304 bytes read: OK
## Booting kernel from Legacy Image at 02000000 ...
Image Name: Linux-4.4.218.armada.1
Created: 2021-11-07 15:34:15 UTC
Image Type: ARM Linux Kernel Image (uncompressed)
Data Size: 3475392 Bytes = 3.3 MiB
Load Address: 00008000
Entry Point: 00008000
Verifying Checksum ... OK
## Loading init Ramdisk from Legacy Image at 03000000 ...
Image Name: initramfs
Created: 2022-02-09 18:28:00 UTC
Image Type: ARM Linux RAMDisk Image (lzma compressed)
Data Size: 3426307 Bytes = 3.3 MiB
Load Address: 00000000
Entry Point: 00000000
Verifying Checksum ... OK
## Flattened Device Tree blob at 01000000
Booting using the fdt blob at 0x01000000
Loading Kernel Image ... OK
Loading Ramdisk to 1f6aa000, end 1f9ee803 ... OK
Using Device Tree in place at 01000000, end 01006617
Updating device tree successful

Starting kernel ...

[ 3.431061] Initramfs unpacking failed: unexpected EOF
[ 3.812759] rtc-isl12057 0-0068: _isl12057_rtc_read_time: oscillator failure bit set, continuing anyway
[ 3.824611] rtc-isl12057 0-0068: _isl12057_rtc_read_time: oscillator failure bit set, continuing anyway
[ 3.836033] rtc-isl12057 0-0068: _isl12057_rtc_read_time: oscillator failure bit set, continuing anyway
[ 3.846962] rtc-isl12057 0-0068: _isl12057_rtc_read_time: oscillator failure bit set, continuing anyway
[ 3.902588] rtc-isl12057 0-0068: _isl12057_rtc_read_time: oscillator failure bit set, continuing anyway
[ 4.350300] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)
[ 4.358609] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 4.4.218.armada.1 #1
[ 4.365428] Hardware name: Marvell Armada 370/XP (Device Tree)
[ 4.371325] [<c0015158>] (unwind_backtrace) from [<c00115ec>] (show_stack+0x10/0x18)
[ 4.379114] [<c00115ec>] (show_stack) from [<c038667c>] (dump_stack+0x84/0xa8)
[ 4.386386] [<c038667c>] (dump_stack) from [<c009bf04>] (panic+0x9c/0x210)
[ 4.393310] [<c009bf04>] (panic) from [<c091a228>] (mount_block_root+0x24c/0x29c)
[ 4.400835] [<c091a228>] (mount_block_root) from [<c091a410>] (prepare_namespace+0x128/0x188)
[ 4.409404] [<c091a410>] (prepare_namespace) from [<c0919e78>] (kernel_init_freeable+0x210/0x260)
[ 4.418332] [<c0919e78>] (kernel_init_freeable) from [<c06c5c2c>] (kernel_init+0x8/0xe8)
[ 4.426466] [<c06c5c2c>] (kernel_init) from [<c000ec20>] (ret_from_fork+0x14/0x34)
[ 4.434078] ---[ end Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)