37 votes

Ext4 vs. XFS vs. Btrfs vs. ZFS for NAS

I generally use one of the following two filesystems: XFS for anything which does not play well with CoW (or for virtual machines whose datastore already is on a CoW filesystem) or when extremely ...
shodanshok's user avatar
  • 50.4k
13 votes
Accepted

VM Inaccessible

BINGO!!! Alright, here is how this was resolved: I referenced this artice for unmounting the datastore, https://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&...
Reedee's user avatar
  • 361
12 votes
Accepted

Disk Usage Analyzer on Synology

Synology has an App on it's DSM store called Storage Analyzer, which provides a very friendly user interface to view usage by folder, user, file types, duplicates, etc... It also keeps a history by ...
lucasmx's user avatar
  • 660
9 votes

What differences are between a NAS, a shared disk file system on a SAN, and a distributed filesystem?

Nowadays the border between NAS and SAN is unclear especially for SMB products. Historically NAS devices consist of the bunch of disks arranged in some RAID to maximize the overall performance and ...
batistuta09's user avatar
  • 9,096
8 votes
Accepted

How much space NAS snapshots consume?

Most NAS snapshots implement copy-on-write, so the snapshot itself initially takes up no space (or next-to-none, there is some overhead). But any block that is changed whilst the file it's part of is ...
MadHatter's user avatar
  • 80.6k
8 votes

CPU speed related with disk io?

LACP always helps with redundancy but isn't your panacea for performance. https://thenetworkway.wordpress.com/2015/05/01/an-overview-of-link-aggregation-and-lacp/ TL;DR: You really need multiple TCP ...
BaronSamedi1958's user avatar
8 votes
Accepted

Moving Hyper-V virtual disk to SMB share gives file not found error in the end

The NAS is a 2U Synology Rack set up in SMB 2.0 and higher mode. Plenty of space on the share (and NAS). The server is Windows 2012 R2 SMB 2.xx is your problem. You need SMB 3.xx to allow Hyper-V ...
BaronSamedi1958's user avatar
8 votes

Ext4 vs. XFS vs. Btrfs vs. ZFS for NAS

This looks more like a question for superuser than for serverfault, but some of the ideas are valid for this site too, so I'll take a stab at answering some of the questions: XFS has had a reputation ...
Mikael H's user avatar
  • 5,089
7 votes

Backup Client Computers using Windows Server or a NAS?

We are using Veeam generally over the whole company's infrastructure and it works great for a years. AFAIR you can even use free version. https://www.veeam.com/free-virtualization-software-vmware-...
Stuka's user avatar
  • 5,715
7 votes

Migrating from AWS EBS to Co-Lo hosted SAN/NAS

SAN/NAS for < $3,600 per TB? This is totally doable. However, don't forget that apart from SAN hardware/software itself, there are lots of things that should be considered, such as: redundant ...
Strepsils's user avatar
  • 5,115
7 votes
Accepted

2 x RAID1 vs. RAID10 with four disks

RAID 10 is just stripes over mirrors. That means for every mirror pair only one drive may fail. You also lose 50% of the storage. I don't know how your NAS handles two RAID 1 arrays but it might be a ...
Christopher Perrin's user avatar
7 votes

Ext4 vs. XFS vs. Btrfs vs. ZFS for NAS

I would use whatever journalling file system the operating system in question suggested as default unless I had very good reason not to. Last time I checked with Ubuntu that was ext4. The reason is ...
Thorbjørn Ravn Andersen's user avatar
7 votes
Accepted

Attach network disk as direct

iSCSI might still do the job in your case. For Windows, try Starwind VSAN which has a free version and can export your disk over iSCSI to another machine. The only thing, you do not need to create a ...
Strepsils's user avatar
  • 5,115
6 votes

The Network folder specified is currently mapped using a different user name and password

If the share is mapped under a different user, you get that message. The mapping is unavailable (to you), and you can't get it to go away. So switch to the other user; unmap the drive in Windows ...
JimB's user avatar
  • 197
6 votes

VM Inaccessible

This tip worked for me in the past, if you can disable ATS-Only: Cannot mount the VMFS5 datastore when using storage encryption appliances (2030416) I guess no VM are up in your case, but they ...
yagmoth555's user avatar
  • 17.1k
6 votes
Accepted

NFS server and client are working but data is not on the server?

I have reproduced this scenario in my test environment and I could find my data normally. To reproduce it I've followed these steps. Make sure that you follow every steps. Editing this file needs ...
Mark Watney's user avatar
6 votes
Accepted

What is Synology's RAID Technology based on?

They use MDRAID+LVM and they use their proprietary software RAID implementation. Second one should be avoided due to smaller user base and recovery issues. https://www.synology.com/en-us/knowledgebase/...
BaronSamedi1958's user avatar
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
  • 9,092
5 votes

Unable to disconnect iSCSI Target

as explained on this forum (and it was also my case), even when disk was offline, task manager (Windows 10) was monitoring disk performance, so closing Task Manager helped :) Other times if I can't ...
Tomeg's user avatar
  • 151
5 votes

What is "Enable Bitmap" on my Qnap NAS?

When an array has a write-intent bitmap, a spindle (a device, often a hard drive) can be removed and re-added, then only blocks changes since the removal (as recorded in the bitmap) will be resynced. ...
Jon-Eric's user avatar
  • 172
5 votes

Disk Usage Analyzer on Synology

NCDU is the closest I can find. Works really well though. Simple to use as you only have to copy the file to the diskstation, then terminal in and run. Some more instructions: http://forum.synology....
info's user avatar
  • 51
5 votes
Accepted

How to get High Availability if using SQL and a NAS?

As noted you will definetely need at least one more NAS to build truly HA environment. Then you connect them as DAS to each of the host, create shared storage across and configure Failover cluster. ...
batistuta09's user avatar
  • 9,096
5 votes

Iscsi set up - Any reasons I shouldn't do what i'm doing?

It's not going to work reliably. NTFS (or ReFS) aren't cluster-aware file systems, multi-mount is going to destroy metadata tables immediately. Either you use SMB3 bolt-on with an arbitration thing on ...
BaronSamedi1958's user avatar
5 votes
Accepted

"Multiple connections to a server or shared resource by the same user" when there are no connections

It turns out windows had cached credentials for this location. Go to Control Panel > Credentials Manager Under Windows Credentials Remove the account that has cached credentials to the network ...
Douglas Gaskell's user avatar
5 votes
Accepted

Is it safe to continue working during btrfs balance operation?

Yes, you can do this while online. Data or metadata references are only updated once a balance has completed for a particular chunk, so it will remain consistent even during modification. If the ...
Spooler's user avatar
  • 7,126
5 votes

Mirroring 2 Host with their own local storage

Look at StarWind VSAN 2-nodes hyperconverged solution on VMware here. It gives a possibility to mirror storage between the hosts and present it as HA datastore to the cluster. Virtual Machines can be ...
batistuta09's user avatar
  • 9,096
5 votes
Accepted

Building/Maintaining a Custom FreeNAS- and ZFS-based NAS

Just want to address a few of your points. Full disclosure, I am a proponent of ZFS. This is all IMHO. RE: your needs: It should not need constant tinkering and maintenance. As long as all ...
mwp's user avatar
  • 198
5 votes

Kubernetes cluster shared storage and backup solutions

It’s the same storage you use as a backend for your running virtual machines, say NFSv3/v4, iSCSI and FC. Concepts behind are very similar. You might want to read the Docker/Kubernetes backup ...
BaronSamedi1958's user avatar
4 votes

Raid 5+1 considerations

If you are using large (say >1TB) consumer drives, RAID5 is probably not your safest bet. In no situation is your weird RAID 1 of (Single drive)+(3 drive RAID5) a good layout at all. The reason ...
Grant's user avatar
  • 18k
4 votes

Best practices for backing up to Amazon s3 and a NAS

I would suggest you take a look at AcloudA that can be used as hardware gateway that presents cloud storage as local DAS to your server and offloads data to the cloud. It can be installed either in ...
Mr. Raspberry's user avatar

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