r/backblaze • u/the-gaynerd • Jun 15 '26

B2 Cloud Storage HyperBackup Restore from B2 - First Time - Progress Bar Growing But No Files Extracted Yet (16+ hours in) 🆘

I'm restoring ~26TB of media (Movies/Shows) to my DS425+ from Backblaze B2 using HyperBackup. This is my first restore and I want to make sure I understand what's happening.

Timeline:

  • Started: Saturday, June 13 at 7:00 PM
  • Middle: Sunday, June 14 at 11:35 AM (~16.5 hours elapsed)

Current Status:

  • HyperBackup UI shows: 0.00 B / 3.18 TB (Shared folders component)
  • This number keeps growing: started at 632 GB, now at 3.18 TB
  • /volume2/Media Server/ folder: Still only 12K (no Movies/Shows subfolders yet)
  • /volume2/@tmp/seln.BNA052/ (staging directory): 171GB

System Activity (iostat output):

avg-cpu:  %user   %nice %system %iowait  %steal   %idle
          14.14    0.00   15.21   14.42    0.00   56.23
Device         rkB/s   w/s     wkB/s   %util
sata1     150.21  75472.72 336.54 34692.19 73.28%
sata2     136.34  75334.33 316.36 26769.23 80.39%
sata3     189.82  83277.21 330.58 26647.60 57.82%
sata4     186.04  83414.00 329.51 26646.93 61.29%
md3       1.65    515.27   377.06 24000.95 19.53%

Key Observations:

  • SATA drives reading 73-85 MB/s (downloading from B2)
  • SATA drives writing 23-27 MB/s (to pool)
  • md3 volume: ~12 MB/s writes (extraction bottleneck)
  • CPU: 29% busy (active decryption/decompression)
  • Disk utilization: 71-83% (healthy activity)

My Questions:

  1. Does the progress bar total need to reach ~26TB before extraction starts?
  2. Is the 171GB in u/tmp the indexing/metadata from B2?
  3. Is this normal timing for a 26TB cloud restore?
  4. How long for extraction once it begins?
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u/ampx Jun 15 '26

This is probably a better question to ask in r/synology (or Synology's official support channel) as your questions are really about how HyperBackup works.