Win-Pro Professional Services - NAS Diagnostic Services Synology (Remote)


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Professional Services - NAS Diagnostic Services Synology (Remote)

Common Synology Issues/Problems

 
Storage Creation and Repair

  • How do I repair a storage pool with a drive that was accidentally removed?
  • The "Repair" option cannot be selected. What can I do?
  • What can I do if the storage pool or volume creation process fails?
  • Why can't I repair a volume with a new hard drive with the same capacity?
  • Why does it take a long time to repair a storage pool?


Storage Capacity and Expansion

  • Can I create a new RAID array if other arrays in the storage pool do not meet their maximum number of drives?
  • How do I calculate the largest storage configuration for my Synology NAS?
  • How do I expand the storage pool or volume capacity?
  • I added new drives to my one-drive SHR, but the available capacity didn't increase. What can I do?
  • I added new drives to my Synology NAS, but the available capacity didn't increase. What can I do?
  • I replaced drives with larger ones, but the available capacity didn't increase. What can I do?
  • The "Add Drive" option cannot be selected. What can I do?
  • What is the maximum single volume size of my Synology NAS?
  • Which Synology NAS model can I use with Synology Expansion Units?


Storage Consumption and Release

  • How can I free up the space consumed by snapshots?
  • How do I configure Snapshot Replication while ensuring effective data deduplication?
  • How do I know when a drive in my Synology device is full?
  • My volume is running out of available space for metadata. What can I do?
  • Storage Manager shows my storage usage is higher than expected. What can I do?
  • The storage space in Synology Drive Server is nearly full. What can I do?
  • Why can’t I use the full capacity of my two installed drives?
  • Why does my hard drive size appear smaller on Synology NAS?
  • I deleted files, but it does not free up the storage space. What can I do?


RAID Related

  • How can I check the structure of Synology RAID 10?
  • How long does it take to expand or repair a storage pool, or change its RAID type?
  • How many drives do I need to create RAID group?
  • I can't switch between RAID 1 and SHR. What can I do?
  • Storage Manager says my storage pool is "without data protection." What does this mean?
  • The "Change RAID Type" option cannot be selected. What can I do?
  • What is a RAID group?
  • What is Synology Hybrid RAID (SHR)?
  • What is the RAID implementation for Btrfs File System on Synology NAS?
  • Which models have limited support for Synology Hybrid RAID (SHR)?
  • Which Synology NAS/IP SAN models support the RAID Group?
  • Which Synology server models support RAID F1?


File System Related

  • How do I enable File self-healing on DSM?
  • How do I change an ext4 volume to a Btrfs volume?
  • What can I do if I receive the message, "The system found excessive and uncorrectable metadata errors"?
  • What should I do if checksum mismatch errors occur?
  • What should I do if file system errors occur?
  • Which file system should I use to create a volume?
  • Which Synology NAS models support the Btrfs file system?


Volume Crash Related

  • Storage Manager shows the system partition cannot be accessed or is damaged. What can I do?
  • What can I do if one of my volumes crashed?
  • What can I do to prevent volumes from crashing?
  • What causes a volume to crash?
  • My volume has become read-only. What can I do?


Data Migration Related

  • Can I reduce the number of drives in an existing storage pool or replace the drives with smaller capacity ones?
  • Can I shrink a volume on my Synology NAS?
  • How do I merge two storage pools or volumes?
  • How do I move my data from one volume to another on the same Synology NAS?


HDD Related

  • Drive errors occurred, but I am not sure if they resulted from the drives or the drive slots. How do I check?
  • How do I choose a suitable HDD for my Synology NAS/IP SAN?
  • How do I recover data from a Synology NAS that is no longer accessible?
  • How do I securely erase data on a drive?
  • How do I identify the drives on my Synology NAS?
  • I received my monthly drive health report. Is there anything I should check for?
  • Some of my drives are not showing up in a Storage Manager wizard. Why is that?
  • The allocation status of my SAS drives read: "Not supported by the current DSM version." What does this mean, and what can I do?
  • There is an increase in my drive's bad sector count. What can I do?
  • There is an increase in my drive's drive re-identification count. What can I do?
  • Storage Manager shows my drive as Incompatible or Unverified. What does it mean and what can I do? (DSM 7.0 and above)
  • Storage Manager shows my drive as Incompatible or Unverified. What does it mean and what can I do? (DSM 6.2.4 and above)
  • What are drive partitions?
  • What are PMR and SMR hard disk drives?
  • What can I do if a drive is in "Warning," "Critical," or other abnormal statuses?
  • What is S.M.A.R.T., and how do I use it to check my drive's health?
  • What is the maximum storage capacity of a single drive supported by my Synology device?
  • What should I do if my drive slots are disabled?
  • What should I do if my Synology NAS cannot recognize the installed drives?
  • My drive allocation status is shown as "Not Initialized." What does this mean?
  • Why is the S.M.A.R.T test stuck at 90%?


SSD Related

  • Frequently asked questions about using Synology SSD cache
  • Which Synology NAS models support using M.2 SSDs to create storage pools?
  • Can I use multiple SSDs to create an SSD cache?
  • Does SSD cache use drive trays?
  • How do I change the SSD cache type?
  • How do I install an SSD into my Synology NAS for the best SSD cache performance?
  • How do I repair a degraded or crashed SSD cache in a Synology High Availability cluster?
  • Important considerations when creating SSD cache
  • My SSD cache size is insufficient. What can I do?
  • My Synology NAS doesn’t recognize my SSD. What should I do?
  • Should I pin all Btrfs metadata to an SSD cache?
  • Should I use M.2 SATA SSDs or M.2 NVMe SSDs for my Synology NAS?
  • What is the minimum recommended size for my SSD cache?
  • What should I do when a read-write SSD cache degrades?
  • Which Synology NAS models support SSD cache?
  • Why can't I use Storage Manager to run the S.M.A.R.T. test on my SSDs?

 

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