6 votes
Accepted

TrueNas Encryption method changed - Is the data safe?

No. Any sane disk encryption system has a header that stores the actual Data Encryption Keys, DEK's. That's the key that actually encrypts data on disk, and is never seen by the user in normal ...
vidarlo's user avatar
  • 9,112
4 votes

Cannot get over 100k iops from storage on 10g network on 4k random blocks

You're saturating the PCIe bus with iowaits, don't look at CPU load. 40g or 100g would help a bit: your problem is latency. You'll never come close to approaching sequential speeds over a NIC doing 4k ...
user2045916's user avatar
3 votes
Accepted

Do SSD still need supercapacitor today ? (NAS : Linux + MDADM + EXT4)

A buffer battery or supercap is required to avoid losing data in the cache that hasn't been written to disk yet. While SSDs are fast (NVMe more so than SAS or SATA), they can't be updated in zero time....
Zac67's user avatar
  • 11.5k
3 votes
Accepted

Partition unreachable in a HDD which was part of a RAID 1 cluster

The key issue is that mdadm --examine /dev/sda4 shows: Device Role : spare This means that the surviving disks had some issues and was "semi-detached" from the array (ie: it was not on ...
shodanshok's user avatar
  • 50.5k
3 votes

Windows Server 2022 NAS/SAN

You’ll need something called “Target mode” server software. They exist for iSCSI (lots), Fibre Channel (less), and SAS (few). Unfortunately for you no SAS target mode stack exists for Windows OS. The ...
BaronSamedi1958's user avatar
1 vote

How can I query the version number of a remote rsync server (daemon)?

While I don't know of a built-in way to determine the version of a remote rsyncd daemon, you can get an idea by telnetting into port 873 to view its response. It will greet you with the protocol ...
jpiddle888's user avatar
1 vote

How to delete files automatically from a NAS

You could run a bash script with crontab that can delete files older than specific number of days: #!/bin/bash # Directory to remove files from directory="/path/to/your/directory" days=X ...
AmirD12's user avatar
  • 44
1 vote

Recoving from a software RAID 5 disk failure

A not mentioned issue here is the MTBF: mean time between failure. After time, all disks deteriorate mechanically. In contrast to RAID4, which has a dedicated parity disk, which also receives the ...
J.M. Stoorvogel's user avatar

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