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Hard disk: 16TB SEAGATE IRONWOLF PRO 3.5", 7200 RPM 256MB CACHE
I have formatted it as BTRFS and the mounting options (fstab) are:
/multimedia btrfs rw,noatime,autodefrag,compress-force=zstd,nossd,space_cache=v2 0 0
The disk works fine, I have not detected any problems but every time I reboot the system takes a long time due to the mounting of this drive:
$ systemd-analyze blame
38.432s multimedia.mount
11.853s systemd-networkd-wait-online.service
589ms plymouth-quit-wait.service
588ms plymouth-quit.service
...
I find it too long to mount a drive, is this normal, is it because of one of the mounting options, or because of the size of the hard drive?
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Does it happen when you try to mount manually? Have you run disk diagnostics for confirming is everything okay with your disk?
Fork it all! Fork it all!
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When I mount it manually it takes the same time.
The smartctl output is correct and the disk works fine:
smartctl 7.2 2020-12-30 r5155 [x86_64-linux-5.15.10-xanmod1-tt-1] (local build)
Copyright (C) 2002-20, Bruce Allen, Christian Franke, www.smartmontools.org
=== START OF INFORMATION SECTION ===
Model Family: Seagate IronWolf Pro
Device Model: ST16000NE000-2RW103
Serial Number: ZL277D53
LU WWN Device Id: 5 000c50 0c68770bb
Firmware Version: EN02
User Capacity: 16.000.900.661.248 bytes [16,0 TB]
Sector Sizes: 512 bytes logical, 4096 bytes physical
Rotation Rate: 7200 rpm
Form Factor: 3.5 inches
Device is: In smartctl database [for details use: -P show]
ATA Version is: ACS-4 (minor revision not indicated)
SATA Version is: SATA 3.3, 6.0 Gb/s (current: 6.0 Gb/s)
Local Time is: Tue Dec 21 09:20:55 2021 CET
SMART support is: Available - device has SMART capability.
SMART support is: Enabled
=== START OF READ SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED
General SMART Values:
Offline data collection status: (0x82) Offline data collection activity
was completed without error.
Auto Offline Data Collection: Enabled.
Self-test execution status: ( 0) The previous self-test routine completed
without error or no self-test has ever
been run.
Total time to complete Offline
data collection: ( 567) seconds.
Offline data collection
capabilities: (0x7b) SMART execute Offline immediate.
Auto Offline data collection on/off support.
Suspend Offline collection upon new
command.
Offline surface scan supported.
Self-test supported.
Conveyance Self-test supported.
Selective Self-test supported.
SMART capabilities: (0x0003) Saves SMART data before entering
power-saving mode.
Supports SMART auto save timer.
Error logging capability: (0x01) Error logging supported.
General Purpose Logging supported.
Short self-test routine
recommended polling time: ( 1) minutes.
Extended self-test routine
recommended polling time: (1412) minutes.
Conveyance self-test routine
recommended polling time: ( 2) minutes.
SCT capabilities: (0x50bd) SCT Status supported.
SCT Error Recovery Control supported.
SCT Feature Control supported.
SCT Data Table supported.
SMART Attributes Data Structure revision number: 10
Vendor Specific SMART Attributes with Thresholds:
ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED WHEN_FAILED RAW_VALUE
1 Raw_Read_Error_Rate 0x000f 082 064 044 Pre-fail Always - 165353740
3 Spin_Up_Time 0x0003 090 087 000 Pre-fail Always - 0
4 Start_Stop_Count 0x0032 100 100 020 Old_age Always - 63
5 Reallocated_Sector_Ct 0x0033 100 100 010 Pre-fail Always - 0
7 Seek_Error_Rate 0x000f 086 060 045 Pre-fail Always - 387809178
9 Power_On_Hours 0x0032 088 088 000 Old_age Always - 10744
10 Spin_Retry_Count 0x0013 100 100 097 Pre-fail Always - 0
12 Power_Cycle_Count 0x0032 100 100 020 Old_age Always - 62
18 Head_Health 0x000b 100 100 050 Pre-fail Always - 0
187 Reported_Uncorrect 0x0032 100 100 000 Old_age Always - 0
188 Command_Timeout 0x0032 100 001 000 Old_age Always - 98785821197
190 Airflow_Temperature_Cel 0x0022 065 045 040 Old_age Always - 35 (Min/Max 30/42)
192 Power-Off_Retract_Count 0x0032 100 100 000 Old_age Always - 21
193 Load_Cycle_Count 0x0032 098 098 000 Old_age Always - 5551
194 Temperature_Celsius 0x0022 035 044 000 Old_age Always - 35 (0 18 0 0 0)
197 Current_Pending_Sector 0x0012 100 100 000 Old_age Always - 0
198 Offline_Uncorrectable 0x0010 100 100 000 Old_age Offline - 0
199 UDMA_CRC_Error_Count 0x003e 200 001 000 Old_age Always - 1049
200 Pressure_Limit 0x0023 100 100 001 Pre-fail Always - 0
240 Head_Flying_Hours 0x0000 100 253 000 Old_age Offline - 10053h+51m+27.896s
241 Total_LBAs_Written 0x0000 100 253 000 Old_age Offline - 75688688889
242 Total_LBAs_Read 0x0000 100 253 000 Old_age Offline - 350984768219
SMART Error Log Version: 1
No Errors Logged
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% 937 -
# 2 Short offline Completed without error 00% 937 -
# 3 Extended offline Completed without error 00% 919 -
SMART Selective self-test log data structure revision number 1
SPAN MIN_LBA MAX_LBA CURRENT_TEST_STATUS
1 0 0 Not_testing
2 0 0 Not_testing
3 0 0 Not_testing
4 0 0 Not_testing
5 0 0 Not_testing
Selective self-test flags (0x0):
After scanning selected spans, do NOT read-scan remainder of disk.
If Selective self-test is pending on power-up, resume after 0 minute delay.
$ sudo btrfs inspect-internal dump-super /dev/sda1
superblock: bytenr=65536, device=/dev/sda1
---------------------------------------------------------
csum_type 0 (crc32c)
csum_size 4
csum 0xf83c0f0d [match]
bytenr 65536
flags 0x1
( WRITTEN )
magic _BHRfS_M [match]
fsid 256db611-dc2d-41d4-8374-b3c4e72bec00
metadata_uuid 256db611-dc2d-41d4-8374-b3c4e72bec00
label multimedia
generation 70314
root 36814848
sys_array_size 129
chunk_root_generation 69937
root_level 0
chunk_root 23052288
chunk_root_level 1
log_root 0
log_root_transid 0
log_root_level 0
total_bytes 16000899592192
bytes_used 12418619920384
sectorsize 4096
nodesize 16384
leafsize (deprecated) 16384
stripesize 4096
root_dir 6
num_devices 1
compat_flags 0x0
compat_ro_flags 0x3
( FREE_SPACE_TREE |
FREE_SPACE_TREE_VALID )
incompat_flags 0x171
( MIXED_BACKREF |
COMPRESS_ZSTD |
BIG_METADATA |
EXTENDED_IREF |
SKINNY_METADATA )
cache_generation 0
uuid_tree_generation 70314
dev_item.uuid a23a745d-ca61-4aa8-b1d0-2a96725472e1
dev_item.fsid 256db611-dc2d-41d4-8374-b3c4e72bec00 [match]
dev_item.type 0
dev_item.total_bytes 16000899592192
dev_item.bytes_used 12462946516992
dev_item.io_align 4096
dev_item.io_width 4096
dev_item.sector_size 4096
dev_item.devid 1
dev_item.dev_group 0
dev_item.seek_speed 0
dev_item.bandwidth 0
dev_item.generation 0
Last edited by j1simon (2021-12-21 08:29:58)
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I have asked on the btrfs mailing list and apparently it is a known problem with large disks the more full they are. In fact, it now takes 54 seconds to mount the unit.
https://lore.kernel.org/linux-btrfs/CAH … l.com/t/#u
https://lore.kernel.org/linux-btrfs/CAM … l.com/t/#u
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Mild necro, this is no longer a problem as long as block_group_tree feature is enabled on the volume (not default, available since 6.1 - 2022-12)
Mount times should be less than a second-ish now.
Checking volumes for having features enabled is easy, see https://gitlab.com/C0rn3j/configs/-/blo … .sh#L76-99
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