Apologies as I know this unit is not supported at all these days but has served me well so wanted totry and get this working again. OS 6 6.10.9 was installed (my initial OS 6 upgrade with the help of an excellent Tech support person a few years ago) and has updates and run flawlessly since. I recently tried a snapshot restore to go to some older files and the system hung/crashed.I couldn't access web Gui, so tried an OS reinstall and then all worked fine.Disks were doing a resync and all finished ok. Next morning the system was powered up but was powered up but hung with no PING or access at all. I have rigged up a Monitor, Keyboard and mouse and created a USB recovery key created. Thought I would try to update to ReadyNASOS-6.10.10-x86_64 via USB:1. Insert USB in front USB port.2. Rebooted with backup button pressed - BIOS loads and syslinux loads but just then monitor screen goes blank and the LCD screen stays on "ReadyNAS" I've tried pressing the reset or pressing the backup button to see if the options scroll but not go. Am I missing something here or should this boot into the USB? I'd like to get working even just to access/backup the current shares if possible, so don't want to go the factory reset if possible. Any advice would be appreciated. Many thanks

Francescoli wrote: Any advice would be appreciated. Not convinced a USB recovery was the right move. Lots of possible causes here, including a failing PSU or a problem disk. Have you tried booting normally with the monitor connected? Any clues there?

Francescoli wrote: Yes boots and ReadyNAS gets stuck at 99% but once the initial load finishes output to the monitor clears. I was hoping it would have a Linux login or something but no luck. I've reinstalling OS via boot menu a few times but same symptoms. You could try tech support mode. If that boots normally you could try manually mounting the volume.

Francescoli wrote: any commands to run to give an idea I don't think this is the OS. Did you download the log zip from RAIDar? It would be useful to get them. I'd start with rnutil chroot to mount the OS partition and chroot. Then I'd use smartctl to test each of the disks. I'd start with the short test, and then run the long one. This will take quite a while, but I think it is important to rule out a disk failure. I would then try to manually mount the data volume. Details on that depend on the expansion history.

Francescoli wrote: On bootup the system states no SMART errors but I'll see what results come from smartctl. The lockup at 99% suggests file system corruption. Hopefully either not the case, or minor. Normally the smart stats only are updated if a disk i/o operation generates an error. The full smartctl test will read every sector on the disk, so that will uncover any latent problems.

Sorry about the lag - I've been pretty busy. The disks look ok. But possibly the file system is damaged. You could check for that with tech support mode, but it does require running several linux commands. Do you have a backup? If you do, another path is to do a factory reset and restore the data. Time consuming, but ensures you have a completely clean file system.

ReadyNAS Pro 6 Business Edition RNDP6000 Booy Issue.

17 Replies

Francescoli
Aspirant
Aug 01, 2026
Hi Sandshark,

Thanks for the info. I'll look up info on a 4.2 boot disk and give that a go.
Sandshark
Sensei
Aug 01, 2026
Your symptom sounds like you are trying to boot an OS6 recovery USB. For legacy units updated to OS6, you have to use an OS4.2.x style USB recovery key but re-name the OS6 image file as if it's an OS4.2.x one.
Francescoli
Aspirant
Jul 31, 2026
I'm not someone who uses Linux so hopefully have selected the correct commands to obtain info:

NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda8:0 0 7.3T 0 disk
sda1 8:1 0 4G 0 part
md0 9:0 0 4G 0 raid1 /
sda2 8:2 0 512M 0 part
md1 9:1 0 1.5G 0 raid10
sda3 8:3 0 7.3T 0 part
md127 9:127 0 36.4T 0 raid5
sdb 8:16 0 7.3T 0 disk
sdb1 8:17 0 4G 0 part
md0 9:0 0 4G 0 raid1 /
sdb2 8:18 0 512M 0 part
md1 9:1 0 1.5G 0 raid10
sdb3 8:19 0 7.3T 0 part
md127 9:127 0 36.4T 0 raid5
sdc 8:32 0 7.3T 0 disk
sdc1 8:33 0 4G 0 part
md0 9:0 0 4G 0 raid1 /
sdc2 8:34 0 512M 0 part
md1 9:1 0 1.5G 0 raid10
sdc3 8:35 0 7.3T 0 part
md127 9:127 0 36.4T 0 raid5
sdd 8:48 0 7.3T 0 disk
sdd1 8:49 0 4G 0 part
md0 9:0 0 4G 0 raid1 /
sdd2 8:50 0 512M 0 part
md1 9:1 0 1.5G 0 raid10
sdd3 8:51 0 7.3T 0 part
md127 9:127 0 36.4T 0 raid5
sde 8:64 0 7.3T 0 disk
sde1 8:65 0 4G 0 part
md0 9:0 0 4G 0 raid1 /
sde2 8:66 0 512M 0 part
md1 9:1 0 1.5G 0 raid10
sde3 8:67 0 7.3T 0 part
md127 9:127 0 36.4T 0 raid5
sdf 8:80 0 7.3T 0 disk
sdf1 8:81 0 4G 0 part
md0 9:0 0 4G 0 raid1 /
sdf2 8:82 0 512M 0 part
md1 9:1 0 1.5G 0 raid10
sdf3 8:83 0 7.3T 0 part
md127 9:127 0 36.4T 0 raid5
sdg 8:96 1 1.9G 0 disk
sdg1 8:97 1 1.9G 0 part
sdh 8:112 1 122.5M 0 disk
sdh1 8:113 1 122.4M 0 part
Francescoli
Aspirant
Jul 30, 2026
Hi Stephen,

Here are the results:

Here are the disk attributes (x6)

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Aborted by host 10% 63886 -
# 2 Short offline Completed without error 00% 63886 -
# 3 Extended offline Completed without error 00% 63187 -
# 4 Extended offline Completed without error 00% 62532 -
# 5 Extended offline Completed without error 00% 61906 -
# 6 Extended offline Completed without error 00% 61079 -
# 7 Extended offline Completed without error 00% 60339 -
# 8 Extended offline Completed without error 00% 59667 -
# 9 Extended offline Completed without error 00% 58178 -
#10 Extended offline Aborted by host 80% 57449 -
#11 Extended offline Completed without error 00% 56964 -
#12 Extended offline Completed without error 00% 56366 -
#13 Extended offline Completed without error 00% 55831 -
#14 Extended offline Aborted by host 40% 55208 -
#15 Extended offline Completed without error 00% 53903 -
#16 Extended offline Completed without error 00% 53180 -
#17 Extended offline Completed without error 00% 52438 -
#18 Extended offline Completed without error 00% 51765 -
#19 Extended offline Completed without error 00% 51022 -
#20 Extended offline Completed without error 00% 50278 -
#21 Extended offline Completed without error 00% 49558 -

root@readynas:/# smartctl -l selftest /dev/sdb
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Aborted by host 20% 63867 -
# 2 Short offline Completed without error 00% 63867 -
# 3 Extended offline Completed without error 00% 63168 -
# 4 Extended offline Completed without error 00% 62514 -
# 5 Extended offline Completed without error 00% 61888 -
# 6 Extended offline Completed without error 00% 61061 -
# 7 Extended offline Completed without error 00% 60320 -
# 8 Extended offline Completed without error 00% 59649 -
# 9 Extended offline Completed without error 00% 58159 -
#10 Extended offline Aborted by host 80% 57430 -
#11 Extended offline Completed without error 00% 56945 -
#12 Extended offline Completed without error 00% 56347 -
#13 Extended offline Completed without error 00% 55812 -
#14 Extended offline Aborted by host 40% 55190 -
#15 Extended offline Aborted by host 10% 54586 -
#16 Extended offline Completed without error 00% 53884 -
#17 Extended offline Completed without error 00% 53162 -
#18 Extended offline Completed without error 00% 52419 -
#19 Extended offline Completed without error 00% 51746 -
#20 Extended offline Completed without error 00% 51004 -
#21 Extended offline Completed without error 00% 50260 -

root@readynas:/# smartctl -l selftest /dev/sdc
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Aborted by host 10% 63886 -
# 2 Short offline Completed without error 00% 63886 -
# 3 Extended offline Completed without error 00% 63187 -
# 4 Extended offline Completed without error 00% 62533 -
# 5 Extended offline Completed without error 00% 61907 -
# 6 Extended offline Completed without error 00% 61080 -
# 7 Extended offline Completed without error 00% 60339 -
# 8 Extended offline Completed without error 00% 59668 -
# 9 Extended offline Completed without error 00% 58179 -
#10 Extended offline Aborted by host 80% 57449 -
#11 Extended offline Completed without error 00% 56964 -
#12 Extended offline Completed without error 00% 56366 -
#13 Extended offline Completed without error 00% 55831 -
#14 Extended offline Aborted by host 40% 55209 -
#15 Extended offline Aborted by host 10% 54605 -
#16 Extended offline Completed without error 00% 53903 -
#17 Extended offline Completed without error 00% 53181 -
#18 Extended offline Completed without error 00% 52438 -
#19 Extended offline Completed without error 00% 51766 -
#20 Extended offline Completed without error 00% 51023 -
#21 Extended offline Completed without error 00% 50279 -

root@readynas:/# smartctl -l selftest /dev/sdd
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Aborted by host 10% 63887 -
# 2 Short offline Completed without error 00% 63887 -
# 3 Extended offline Completed without error 00% 63188 -
# 4 Extended offline Completed without error 00% 62533 -
# 5 Extended offline Completed without error 00% 61906 -
# 6 Extended offline Completed without error 00% 61081 -
# 7 Extended offline Completed without error 00% 60340 -
# 8 Extended offline Completed without error 00% 59668 -
# 9 Extended offline Completed without error 00% 58179 -
#10 Extended offline Aborted by host 80% 57450 -
#11 Extended offline Completed without error 00% 56964 -
#12 Extended offline Completed without error 00% 56367 -
#13 Extended offline Completed without error 00% 55832 -
#14 Extended offline Aborted by host 40% 55209 -
#15 Extended offline Aborted by host 10% 54606 -
#16 Extended offline Completed without error 00% 53904 -
#17 Extended offline Completed without error 00% 53181 -
#18 Extended offline Completed without error 00% 52439 -
#19 Extended offline Completed without error 00% 51766 -
#20 Extended offline Completed without error 00% 51023 -
#21 Extended offline Completed without error 00% 50279 -

root@readynas:/# smartctl -l selftest /dev/sde
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Completed without error 00% 63887 -
# 2 Extended offline Completed without error 00% 63188 -
# 3 Extended offline Completed without error 00% 62533 -
# 4 Extended offline Completed without error 00% 61907 -
# 5 Extended offline Completed without error 00% 61081 -
# 6 Extended offline Completed without error 00% 60339 -
# 7 Extended offline Completed without error 00% 59668 -
# 8 Extended offline Completed without error 00% 58179 -
# 9 Extended offline Aborted by host 80% 57450 -
#10 Extended offline Completed without error 00% 56964 -
#11 Extended offline Completed without error 00% 56367 -
#12 Extended offline Completed without error 00% 55832 -
#13 Extended offline Aborted by host 40% 55209 -
#14 Extended offline Aborted by host 10% 54606 -
#15 Extended offline Completed without error 00% 53904 -
#16 Extended offline Completed without error 00% 53181 -
#17 Extended offline Completed without error 00% 52439 -
#18 Extended offline Completed without error 00% 51766 -
#19 Extended offline Completed without error 00% 51023 -
#20 Extended offline Completed without error 00% 50279 -
#21 Extended offline Completed without error 00% 49558 -

root@readynas:/# smartctl -l selftest /dev/sdf
smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF READ SMART DATA SECTION ===
SMART Self-test log structure revision number 1
Num Test_Description Status Remaining LifeTime(hours) LBA_of_first_error
# 1 Short offline Aborted by host 10% 63886 -
# 2 Extended offline Completed without error 00% 63188 -
# 3 Extended offline Completed without error 00% 62533 -
# 4 Extended offline Completed without error 00% 61907 -
# 5 Extended offline Completed without error 00% 61082 -
# 6 Extended offline Completed without error 00% 60339 -
# 7 Extended offline Completed without error 00% 59668 -
# 8 Extended offline Completed without error 00% 58179 -
# 9 Extended offline Aborted by host 80% 57449 -
#10 Extended offline Completed without error 00% 56964 -
#11 Extended offline Completed without error 00% 56367 -
#12 Extended offline Completed without error 00% 55831 -
#13 Extended offline Aborted by host 40% 55209 -
#14 Extended offline Aborted by host 10% 54605 -
#15 Extended offline Completed without error 00% 53904 -
#16 Extended offline Completed without error 00% 53181 -
#17 Extended offline Completed without error 00% 52439 -
#18 Extended offline Completed without error 00% 51766 -
#19 Extended offline Completed without error 00% 51023 -
#20 Extended offline Completed without error 00% 50279 -
#21 Extended offline Completed without error 00% 49558 -
- Francescoli
  Aspirant
  Jul 31, 2026
  === START OF READ SMART DATA SECTION ===
  SMART Attributes Data Structure revision number: 16
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
  2 Throughput_Performance 0x0005 134 134 054 Pre-fail Offline - 105
  3 Spin_Up_Time 0x0007 153 153 024 Pre-fail Always - 418 (Average 441)
  4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 662
  5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
  7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
  8 Seek_Time_Performance 0x0005 128 128 020 Pre-fail Offline - 18
  9 Power_On_Hours 0x0012 091 091 000 Old_age Always - 63895
  10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
  12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 256
  22 Helium_Level 0x0023 100 100 025 Pre-fail Always - 100
  192 Power-Off_Retract_Count 0x0032 098 098 000 Old_age Always - 3122
  193 Load_Cycle_Count 0x0012 098 098 000 Old_age Always - 3122
  194 Temperature_Celsius 0x0002 157 157 000 Old_age Always - 38 (Min/Max 18/55)
  196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
  197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
  198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
  199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
  
  root@readynas:/# smartctl -A /dev/sdb
  smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
  Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
  
  === START OF READ SMART DATA SECTION ===
  SMART Attributes Data Structure revision number: 16
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
  2 Throughput_Performance 0x0005 133 133 054 Pre-fail Offline - 108
  3 Spin_Up_Time 0x0007 152 152 024 Pre-fail Always - 425 (Average 440)
  4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 720
  5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
  7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
  8 Seek_Time_Performance 0x0005 128 128 020 Pre-fail Offline - 18
  9 Power_On_Hours 0x0012 091 091 000 Old_age Always - 63876
  10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
  12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 257
  22 Helium_Level 0x0023 100 100 025 Pre-fail Always - 100
  192 Power-Off_Retract_Count 0x0032 096 096 000 Old_age Always - 5011
  193 Load_Cycle_Count 0x0012 096 096 000 Old_age Always - 5011
  194 Temperature_Celsius 0x0002 150 150 000 Old_age Always - 40 (Min/Max 18/58)
  196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
  197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
  198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
  199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
  
  root@readynas:/# smartctl -A /dev/sdc
  smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
  Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
  
  === START OF READ SMART DATA SECTION ===
  SMART Attributes Data Structure revision number: 16
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
  2 Throughput_Performance 0x0005 134 134 054 Pre-fail Offline - 103
  3 Spin_Up_Time 0x0007 155 155 024 Pre-fail Always - 413 (Average 435)
  4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 732
  5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
  7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
  8 Seek_Time_Performance 0x0005 128 128 020 Pre-fail Offline - 18
  9 Power_On_Hours 0x0012 091 091 000 Old_age Always - 63895
  10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
  12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 257
  22 Helium_Level 0x0023 100 100 025 Pre-fail Always - 100
  192 Power-Off_Retract_Count 0x0032 098 098 000 Old_age Always - 3149
  193 Load_Cycle_Count 0x0012 098 098 000 Old_age Always - 3149
  194 Temperature_Celsius 0x0002 153 153 000 Old_age Always - 39 (Min/Max 18/56)
  196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
  197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
  198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
  199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
  
  root@readynas:/# smartctl -A /dev/sdd
  smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
  Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
  
  === START OF READ SMART DATA SECTION ===
  SMART Attributes Data Structure revision number: 16
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
  2 Throughput_Performance 0x0005 132 132 054 Pre-fail Offline - 112
  3 Spin_Up_Time 0x0007 151 151 024 Pre-fail Always - 442 (Average 428)
  4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 754
  5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
  7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
  8 Seek_Time_Performance 0x0005 128 128 020 Pre-fail Offline - 18
  9 Power_On_Hours 0x0012 091 091 000 Old_age Always - 63896
  10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
  12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 255
  22 Helium_Level 0x0023 100 100 025 Pre-fail Always - 100
  192 Power-Off_Retract_Count 0x0032 098 098 000 Old_age Always - 3160
  193 Load_Cycle_Count 0x0012 098 098 000 Old_age Always - 3160
  194 Temperature_Celsius 0x0002 162 162 000 Old_age Always - 37 (Min/Max 18/55)
  196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
  197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
  198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
  199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
  
  root@readynas:/# smartctl -A /dev/sde
  smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
  Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
  
  === START OF READ SMART DATA SECTION ===
  SMART Attributes Data Structure revision number: 16
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
  2 Throughput_Performance 0x0005 133 133 054 Pre-fail Offline - 108
  3 Spin_Up_Time 0x0007 154 154 024 Pre-fail Always - 419 (Average 437)
  4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 751
  5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
  7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
  8 Seek_Time_Performance 0x0005 128 128 020 Pre-fail Offline - 18
  9 Power_On_Hours 0x0012 091 091 000 Old_age Always - 63895
  10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
  12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 258
  22 Helium_Level 0x0023 100 100 025 Pre-fail Always - 100
  192 Power-Off_Retract_Count 0x0032 097 097 000 Old_age Always - 3926
  193 Load_Cycle_Count 0x0012 097 097 000 Old_age Always - 3926
  194 Temperature_Celsius 0x0002 153 153 000 Old_age Always - 39 (Min/Max 18/56)
  196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
  197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
  198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
  199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
  
  root@readynas:/# smartctl -A /dev/sdf
  smartctl 6.6 2017-11-05 r4594 [x86_64-linux-4.4.68.x86_64.1] (local build)
  Copyright (C) 2002-17, Bruce Allen, Christian Franke, www.smartmontools.org
  
  === START OF READ SMART DATA SECTION ===
  SMART Attributes Data Structure revision number: 16
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
  1 Raw_Read_Error_Rate 0x000b 100 100 016 Pre-fail Always - 0
  2 Throughput_Performance 0x0005 134 134 054 Pre-fail Offline - 104
  3 Spin_Up_Time 0x0007 157 157 024 Pre-fail Always - 416 (Average 422)
  4 Start_Stop_Count 0x0012 100 100 000 Old_age Always - 743
  5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0
  7 Seek_Error_Rate 0x000b 100 100 067 Pre-fail Always - 0
  8 Seek_Time_Performance 0x0005 128 128 020 Pre-fail Offline - 18
  9 Power_On_Hours 0x0012 091 091 000 Old_age Always - 63895
  10 Spin_Retry_Count 0x0013 100 100 060 Pre-fail Always - 0
  12 Power_Cycle_Count 0x0032 100 100 000 Old_age Always - 255
  22 Helium_Level 0x0023 100 100 025 Pre-fail Always - 100
  192 Power-Off_Retract_Count 0x0032 098 098 000 Old_age Always - 3161
  193 Load_Cycle_Count 0x0012 098 098 000 Old_age Always - 3161
  194 Temperature_Celsius 0x0002 157 157 000 Old_age Always - 38 (Min/Max 19/54)
  196 Reallocated_Event_Count 0x0032 100 100 000 Old_age Always - 0
  197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 0
  198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0
  199 UDMA_CRC_Error_Count 0x000a 200 200 000 Old_age Always - 0
  - StephenB
    Guru - Experienced User
    Aug 01, 2026
    Sorry about the lag - I've been pretty busy.
    
    The disks look ok. But possibly the file system is damaged.
    
    You could check for that with tech support mode, but it does require running several linux commands.
    
    Do you have a backup? If you do, another path is to do a factory reset and restore the data. Time consuming, but ensures you have a completely clean file system.
Francescoli
Aspirant
Jul 30, 2026
Thanks, I'll try that Stephan and let post the results. On bootup the system states no SMART errors but I'll see what results come from smartctl.
- StephenB
  Guru - Experienced User
  Jul 30, 2026
  Francescoli wrote:
  On bootup the system states no SMART errors but I'll see what results come from smartctl.
  
  The lockup at 99% suggests file system corruption. Hopefully either not the case, or minor.
  
  Normally the smart stats only are updated if a disk i/o operation generates an error. The full smartctl test will read every sector on the disk, so that will uncover any latent problems.
Francescoli
Aspirant
Jul 30, 2026
Tried Raidar and shows up ok.
Looked up your reply to another post :-) and can login via telnet now. any commands to run to give an idea or can i flash from linux iteslf?
- StephenB
  Guru - Experienced User
  Jul 30, 2026
  Francescoli wrote:
  any commands to run to give an idea
  
  I don't think this is the OS. Did you download the log zip from RAIDar? It would be useful to get them.
  
  I'd start with rnutil chroot to mount the OS partition and chroot.
  
  Then I'd use smartctl to test each of the disks. I'd start with the short test, and then run the long one. This will take quite a while, but I think it is important to rule out a disk failure.
  
  I would then try to manually mount the data volume. Details on that depend on the expansion history.
Francescoli
Aspirant
Jul 30, 2026
Hi Stephen,

Techsupport > rebooted then displays DebugModel[51249] and the local IP address. Tried pinging = OK, no web GUI or SSH access.
Francescoli
Aspirant
Jul 30, 2026
At BIOS boot shows no issues - SMART passed for all disk and initially boots into the OS. That's why I decided to try the USB recovery as that was mentioned in a few searches.
Francescoli
Aspirant
Jul 30, 2026
HI Stephen,

Yes boots and ReadyNAS gets stuck at 99% but once the initial load finishes output to the monitor clears. I was hoping it would have a Linux login or something but no luck. I've reinstalling OS via boot menu a few times but same symptoms.
- StephenB
  Guru - Experienced User
  Jul 30, 2026
  Francescoli wrote:
  Yes boots and ReadyNAS gets stuck at 99% but once the initial load finishes output to the monitor clears. I was hoping it would have a Linux login or something but no luck. I've reinstalling OS via boot menu a few times but same symptoms.
  
  You could try tech support mode. If that boots normally you could try manually mounting the volume.
StephenB
Guru - Experienced User
Jul 30, 2026
Francescoli wrote:
Any advice would be appreciated.

Not convinced a USB recovery was the right move.

Lots of possible causes here, including a failing PSU or a problem disk.

Have you tried booting normally with the monitor connected? Any clues there?