Essential Guide to NAS Lenovo ThinkSystem ST50 Data Recovery

Contents

• Why Regular Data Recovery Tools Can’t Restore Files from RAID
• Key Information About the NAS Lenovo ThinkSystem ST50
• How to Remove Hard Disks from Your NAS and Connect Them to a PC
  • Step-by-Step Data Recovery with Hetman RAID Recovery
  • How to Safely Recover Data from Disk Images
  • Where Are the User’s Files Actually Stored?
  • RAID Recovery Software: Detailed Comparison

Why Regular Data Recovery Tools Can’t Restore Files from RAID

Conventional hard drives store user data by writing it sequentially across the disk surface, which means an entire file is typically located on a single drive. In contrast, when data is written to a RAID array, each file is split into multiple fragments. These fragments are then distributed and written in sequence across all the drives in the array. Depending on the configuration, fragment sizes can range from 2 KB to 2 MB, so every file is physically stored across several disks at once.

This approach significantly increases read and write performance — after all, writing two halves of a 1 GB file to two drives simultaneously is much faster than writing the full 1 GB to a single disk. However, this same mechanism makes file recovery far more complex.

Different RAID levels use different methods to distribute and protect data. On top of that, manufacturers like Lenovo often add their own proprietary structures and variations. As a result, data can be written to disks in many different formats, and each requires a specific approach during recovery.

Are there any specific precautions to take while migrating data between NAS Lenovo ThinkSystem ST50 devices?

Yes, there are a few precautions you should take while migrating data between NAS Lenovo ThinkSystem ST50 devices. Here are some key considerations:

1. Backup your data: Before starting the migration process, it is crucial to create a backup of all your data. This ensures that even if something goes wrong during the migration, you will still have a copy of your important files.
2. Verify compatibility: Ensure that the destination NAS Lenovo ThinkSystem ST50 device supports the same file systems and protocols as the source device. This will help ensure a smooth migration process without any compatibility issues.
3. Plan the migration process: Create a detailed plan outlining the steps involved in the migration process. This includes identifying the data to be migrated, determining the order of migration, and estimating the time required for each step.
4. Allocate sufficient time: Migrating data between NAS devices can take a significant amount of time, depending on the amount of data and the network speed. Allocate sufficient time for the migration process to avoid rushing and potential errors.
5. Test the migration process: Before initiating the actual migration, perform a test migration with a small amount of data to ensure everything works as expected. This will help identify any potential issues or challenges that may arise during the actual migration.
6. Monitor the migration progress: Keep a close eye on the migration process to ensure it is progressing smoothly. Monitor the data transfer speed, network connectivity, and any error messages that may appear. This will help you identify and address any issues promptly.
7. Verify data integrity: After the migration is complete, verify the integrity of the migrated data by comparing it with the original data. Perform data validation checks to ensure that no data loss or corruption occurred during the migration process.
8. Keep a rollback plan: In case the migration encounters unexpected issues or errors, have a rollback plan in place. This includes having a backup of the original data and a step-by-step plan to revert to the previous state if needed.

By following these precautions, you can minimize the risk of data loss or corruption during the migration process and ensure a successful transfer of data between NAS Lenovo ThinkSystem ST50 devices.

How to Remove Hard Disks from Your NAS and Connect Them to a PC

Although the NAS ThinkSystem ST50 can be accessed over the network, you still need to remove its hard disks and connect them directly to a Windows PC. Only then can the recovery software properly scan and analyze the drives. Follow these steps:

1. Power off the NAS and disconnect it from the power source.

   WARNING! Before removing any drives, carefully read the device manual. Improper actions may damage both the NAS enclosure and the hard disks in the RAID array.

2. Remove the hard disks one by one, gently sliding each drive out of its slot. Remember that hard disks are highly sensitive: any impact or drop can cause serious physical damage.

3. Label each hard disk according to its position inside the NAS. The order of the drives is crucial for correct RAID reconstruction.

4. Connect the drives to your computer. In this video, we explain which ports you can use to connect hard disks and what to do if your PC does not have enough free connectors.

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   How to Order Remote Data Recovery

Step-by-Step Data Recovery with Hetman RAID Recovery

This program restores data from damaged RAID arrays and is fully compatible with Lenovo ThinkSystem ST50. Each hard disk in the array contains technical metadata describing how files were written. When launched, Hetman RAID Recovery analyzes this metadata, automatically reconstructs the damaged array, and provides access to its contents. After that, you can browse the recovered disk and save your files. The program can also restore files that were accidentally deleted from the network drive.

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How to recover data from a Lenovo

ThinkSystem ST50 has 128 HDD slots, and it supports the following array types:

• RAID 0;
• RAID 1;
• RAID 5;
• RAID 6;
• RAID 50;
• RAID 60;
• JBOD;

NAS supports:

• exFAT, VFAT, FAT 12 / 16 / 32;
• NTFS / ReFS;
• APFS / HFS+;
• Ext2 / 3 / 4 / ReiserFS / XFS / UFS / ZFS / Btrfs;
• VMFS / HikvisionFS;

How to Safely Recover Data from Disk Images

This utility allows you to create a complete copy of a disk and work with the disk image instead of the physical drive. This approach helps protect your data from:

• Overwriting during the recovery process;
• Additional data loss caused by bad sectors;
• User errors.

To create a disk image, follow these steps:

1. Ensure you have enough free space to store the image. Its size will typically match the size of the original disk.

2. In the main window, select the target disk and choose Tools - Save Disk. You can also select multiple disks if needed.

3. When the Image Creation Wizard opens, select whether you want to save the entire disk or only a specific region. Adjust the settings and click Next.

   

4. Choose the directory where the image will be saved. You may select any available disk connected to your PC or upload the image via FTP.

   

Where Are the User’s Files Actually Stored?

The Lenovo ThinkSystem ST50 network-attached storage keeps LifeLine operating system files on a separate RAID 1 (mirrored) array. Usually, all NAS systems create several volumes on every hard disk, and the first of them takes up to 2 Gb of space. This is where operating system files are stored. Other volumes are united into a RAID array where user’s data is written.

RAID Recovery Software: Detailed Comparison