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Missing Storage Readynas 516
I am running my 516 nas with 6 x 4TB hard drives = 24TB in XRAID RAID 5 My NAS tells me i have 10.11TB Free Space Used Data 4.33TB i thought 24TB's in Raid 5 would give me 20TB space I started of w...
After a Resync the volume has now expanded showing correct size 18.07TB instead of 14.43
After downloading the logfiles you might want to check btrfs.log to see how the partitions are truely layed out and you will see something like this
Label: 'xxx:data' uuid: yyy
Total devices 2 FS bytes used 7.59TiB
devid 1 size 5.44TiB used 3.70TiB path /dev/md127
devid 2 size 10.92TiB used 3.91TiB path /dev/md126
I have 4x6TB RN204, which in raid5 finally results into a volume of roughly 16.5TiB. Which is exactly that, what one would expect in this case.
How do i download the logfiles
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pgjscottieuk wrote:
How do i download the logfiles
There's a download control on the log page in the web ui. That will download the full log zipfile.
Your volume appears to be 4 TB short. There are three possibilities.
- You could be running dual redundancy
- The btrfs volume might not have expanded when the last disk was added (even if all disks are in the RAID array).
- One disk might not be part of the active RAID array (despite the status shown in your screenshot)..
In the last case, one of the disks might be marked as a "spare" in the logs. Try looking through btrfs.log, mdstat.log and volume.log.
Have looked through the files you have mentioned cant find anything suggesting a spare have attached thanks again for help
There did seem to be a spare at the end of the mdstat.log number 3 ?
Personalities : [raid0] [raid1] [raid10] [raid6] [raid5] [raid4] md127 : active raid5 sde3[0] sdc3[3](S) sda3[5] sdb3[4] sdd3[2] sdf3[1] 15608666624 blocks super 1.2 level 5, 64k chunk, algorithm 2 [5/5] [UUUUU] md1 : active raid6 sdc2[0] sda2[5] sdb2[4] sdf2[3] sde2[2] sdd2[1] 2093056 blocks super 1.2 level 6, 512k chunk, algorithm 2 [6/6] [UUUUUU] md0 : active raid1 sde1[0] sda1[5] sdb1[4] sdc1[3] sdd1[2] sdf1[1] 4192192 blocks super 1.2 [6/6] [UUUUUU] unused devices: <none> /dev/md/0: Version : 1.2 Creation Time : Thu Feb 19 15:00:27 2015 Raid Level : raid1 Array Size : 4192192 (4.00 GiB 4.29 GB) Used Dev Size : 4192192 (4.00 GiB 4.29 GB) Raid Devices : 6 Total Devices : 6 Persistence : Superblock is persistent Update Time : Mon Mar 13 21:05:10 2017 State : clean Active Devices : 6 Working Devices : 6 Failed Devices : 0 Spare Devices : 0 Name : 7c6e3734:0 (local to host 7c6e3734) UUID : c1aecbdd:0f2a5130:71ba0480:07a324f5 Events : 1139 Number Major Minor RaidDevice State 0 8 65 0 active sync /dev/sde1 1 8 81 1 active sync /dev/sdf1 2 8 49 2 active sync /dev/sdd1 3 8 33 3 active sync /dev/sdc1 4 8 17 4 active sync /dev/sdb1 5 8 1 5 active sync /dev/sda1 /dev/md/1: Version : 1.2 Creation Time : Sat Sep 24 11:40:47 2016 Raid Level : raid6 Array Size : 2093056 (2044.00 MiB 2143.29 MB) Used Dev Size : 523264 (511.00 MiB 535.82 MB) Raid Devices : 6 Total Devices : 6 Persistence : Superblock is persistent Update Time : Thu Mar 9 17:35:17 2017 State : clean Active Devices : 6 Working Devices : 6 Failed Devices : 0 Spare Devices : 0 Layout : left-symmetric Chunk Size : 512K Name : 7c6e3734:1 (local to host 7c6e3734) UUID : 39ce8693:bda6cd12:2a906266:c669f6f5 Events : 19 Number Major Minor RaidDevice State 0 8 34 0 active sync /dev/sdc2 1 8 50 1 active sync /dev/sdd2 2 8 66 2 active sync /dev/sde2 3 8 82 3 active sync /dev/sdf2 4 8 18 4 active sync /dev/sdb2 5 8 2 5 active sync /dev/sda2 /dev/md/data-0: Version : 1.2 Creation Time : Thu Feb 19 15:00:27 2015 Raid Level : raid5 Array Size : 15608666624 (14885.58 GiB 15983.27 GB) Used Dev Size : 3902166656 (3721.40 GiB 3995.82 GB) Raid Devices : 5 Total Devices : 6 Persistence : Superblock is persistent Update Time : Mon Mar 13 21:04:44 2017 State : clean Active Devices : 5 Working Devices : 6 Failed Devices : 0 Spare Devices : 1 Layout : left-symmetric Chunk Size : 64K Name : 7c6e3734:data-0 (local to host 7c6e3734) UUID : 2fb715d8:4a24e72b:57e364dc:cda58209 Events : 22927 Number Major Minor RaidDevice State 0 8 67 0 active sync /dev/sde3 1 8 83 1 active sync /dev/sdf3 2 8 51 2 active sync /dev/sdd3 4 8 19 3 active sync /dev/sdb3 5 8 3 4 active sync /dev/sda3 3 8 35 - spare /dev/sdc3
Yes, one of the disks has been marked as a spare.
It's also clear that your volume was created on very old firmware.
On the admin webpage in the logfile tab you can download a zipfile containing 60+ logfiles amongst them btrfs.log.
Retired_Member
There is also an OS partition (4GB) and a swap partition (500MB I think) on every drive.
So, by order of importance:
1. RAID redundancy.
2. HDD manufacturer fantasy 1000 factor, implying difference between TB and TiB.
3. 4GB OS + 500MB Swap per HDD.
4. FS overhead.
I think you're right about the spare.
Please find the btrfs.log
Label: '7c6e3734:root' uuid: 02c2df95-1651-4bf0-af83-582b5010b5ee Total devices 1 FS bytes used 825.85MiB devid 1 size 4.00GiB used 4.00GiB path /dev/md0 Label: '7c6e3734:data' uuid: afa8cfbe-ebc8-4c1f-8ab0-a1b1d851b14b Total devices 1 FS bytes used 4.34TiB devid 1 size 14.54TiB used 4.63TiB path /dev/md127 === filesystem /data === Data, single: total=4.52TiB, used=4.33TiB System, DUP: total=8.00MiB, used=532.00KiB System, single: total=4.00MiB, used=0.00B Metadata, DUP: total=57.50GiB, used=4.96GiB Metadata, single: total=8.00MiB, used=0.00B GlobalReserve, single: total=512.00MiB, used=0.00B === subvolume /data === ID 256 gen 114574 top level 5 path home ID 259 gen 134390 top level 5 path .apps ID 260 gen 7 top level 5 path .vault ID 262 gen 128365 top level 5 path Pictures ID 263 gen 134185 top level 5 path FILMS ID 264 gen 128365 top level 5 path Music ID 265 gen 121597 top level 5 path Documents ID 266 gen 130260 top level 5 path Backup ID 267 gen 133755 top level 5 path ._share ID 268 gen 121600 top level 5 path .timemachine ID 274 gen 121600 top level 266 path Backup/.snapshots ID 276 gen 121595 top level 265 path Documents/.snapshots ID 278 gen 121590 top level 264 path Music/.snapshots ID 280 gen 121585 top level 262 path Pictures/.snapshots ID 282 gen 133950 top level 263 path FILMS/.snapshots ID 284 gen 59664 top level 256 path home/admin ID 827 gen 38005 top level 5 path .purge === btrfs-show-super /dev/md0 /dev/md127 superblock: bytenr=65536, device=/dev/md0 --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0xbd8c24b9 [match] bytenr 65536 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid 02c2df95-1651-4bf0-af83-582b5010b5ee label 7c6e3734:root generation 204967 root 33370112 sys_array_size 226 chunk_root_generation 108555 root_level 1 chunk_root 20971520 chunk_root_level 0 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 4292804608 bytes_used 865964032 sectorsize 4096 nodesize 4096 leafsize 4096 stripesize 4096 root_dir 6 num_devices 1 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x1 ( MIXED_BACKREF ) cache_generation 2556 uuid_tree_generation 204967 dev_item.uuid 684bde8e-8778-4436-a921-f4f3422fccb7 dev_item.fsid 02c2df95-1651-4bf0-af83-582b5010b5ee [match] dev_item.type 0 dev_item.total_bytes 4292804608 dev_item.bytes_used 4292804608 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 superblock: bytenr=65536, device=/dev/md127 --------------------------------------------------------- csum_type 0 (crc32c) csum_size 4 csum 0xafa88107 [match] bytenr 65536 flags 0x1 ( WRITTEN ) magic _BHRfS_M [match] fsid afa8cfbe-ebc8-4c1f-8ab0-a1b1d851b14b label 7c6e3734:data generation 134390 root 5591031808 sys_array_size 226 chunk_root_generation 134153 root_level 2 chunk_root 20975616 chunk_root_level 2 log_root 0 log_root_transid 0 log_root_level 0 total_bytes 15983274622976 bytes_used 4768776925184 sectorsize 4096 nodesize 4096 leafsize 4096 stripesize 4096 root_dir 6 num_devices 1 compat_flags 0x0 compat_ro_flags 0x0 incompat_flags 0x1 ( MIXED_BACKREF ) cache_generation 40 uuid_tree_generation 134390 dev_item.uuid b934a4af-c55d-4c00-8721-264456194c1b dev_item.fsid afa8cfbe-ebc8-4c1f-8ab0-a1b1d851b14b [match] dev_item.type 0 dev_item.total_bytes 15983274622976 dev_item.bytes_used 5091721478144 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
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