Questions tagged [network-attached-storage]

NAS stands for Network Attached Storage, a mechanism for providing file-level access to storage across a network.

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What is the difference between SAN, NAS and DAS?

What is the difference between SAN, NAS and DAS?
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44 votes
17 answers
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What network file sharing protocol has the best performance and reliability? [closed]

We have a setup with a few web servers being load-balanced. We want to have some sort of network shared storage that all of the web servers can access. It will be used as a place to store files ...
Apreche's user avatar
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43 votes
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Ext4 vs. XFS vs. Btrfs vs. ZFS for NAS [closed]

My use case: I have Ubuntu Server 18.04 installed on an M.2 SSD. I have a 4TB HDD I want to add as storage. Since it's mostly for large media files and backups, it won't be written to very often. ...
Alex Shaw's user avatar
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37 votes
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What is a Storage Area Network, and which benefits does it have over different storage solutions?

I'm proposing this to be a canonical question about enterprise-level Storage Area Networks. What is a Storage Area Network (SAN), and how does it work? How is it different from a Network Attached ...
Massimo's user avatar
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31 votes
1 answer
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NAS Performance: NFS vs Samba vs GlusterFS

I am planning my new shared storage infrastructure for a small webserver farm. Therefore i ran a lot of tests with a lot of NAS filesystems. By doing so, i got some unexpected results and would like ...
Linus Ardberk's user avatar
29 votes
2 answers
17k views

ZFS RAID and LUKS encryption in Linux

I'm planning to setup a set of 3x 2TB 7200rpm drives as a LUKS-encrypted Z-RAID pool in Linux (for a NAS solution). My understanding of the problem at hand is that the only way to achieve this is to ...
MasterM's user avatar
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16 votes
9 answers
85k views

Why pick a NAS over a "normal" NFS share? [duplicate]

From an end-user perspective, what is the difference between a NAS device and using NFS exports from a file server? They seem to accomplish the same end result. The difference between a SAN and ...
warren's user avatar
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15 votes
3 answers
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Networking Units: Not getting expected performance from 100Mb Ethernet

Our company has a brand new NAS, and the idea is that we will be able to use it for fast, shared access to our data on our network. It's a fairly simple 2-disk system, but from what I understand, it ...
florent's user avatar
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15 votes
7 answers
20k views

SQL Server Files Local or NAS or SAN?

I have to install a new Server with SQL Server 2008, What do you recommend, One server with Raid 10 or the Files in a NAS? What about iSCSI should I use it? What about SAN? The server has 4Gb of ...
Jedi Master Spooky's user avatar
14 votes
7 answers
4k views

How do you backup a storage server?

I'm looking at implementing a very large storage server to be used as live NAS for several other servers (all Linux-based). By very large, I mean between 4TB and 20TB usable space (although it's ...
Andrew Ensley's user avatar
13 votes
8 answers
2k views

RAID configuration for large NAS

I'm thinking of building a 24 1TB disk NAS box, but I'm not sure what the best drive configuration is. I'm looking at using the areca ARC-1280ML-2G controller, and hanging all 24 drives off of it. I'...
kevin42's user avatar
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5 answers
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Disk Usage Analyzer on Synology

How can I get an overview of the disk usage on a Synology hard drives like this:
kimliv's user avatar
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13 votes
2 answers
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VM Inaccessible

So I had to remotely shut down my servers last night as the air conditioner crapped out on us. I shut down the VMs and then the hosts. Fired up the 2 hosts today which auto start the VMs. Datastores ...
Reedee's user avatar
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13 votes
4 answers
131k views

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

I have a NAS device, it has 3 shares. On one computer I have access to all 3 of the shares. On another computer I keep getting this error when try and add a 2nd one. The Network folder specified is ...
Jason's user avatar
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10 votes
10 answers
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Should I build my own or buy a cheap NAS? [closed]

I've looked at this question and gotten some ideas from it. Assume I want something that runs quietly with raid support. I see the choices as being buy a home NAS solution most of which appear to be $...
Jared's user avatar
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10 votes
9 answers
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Scalable (> 24 TB) NAS for research department

I have been asked to provide a new fileserver to store our medical images (raw format, not dicom). As we have no IT staff, I have to find a solution, and I hardly know anything about this topic. The ...
Ibaun's user avatar
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9 votes
5 answers
2k views

Is brand-name NAS overpriced?

NetGear's ReadyNAS 2100 has 4 disk slots and costs $2000 with no disks. That seems a bit too expensive for just 4 disk slots. Dell has good network storage solutions too. PowerVault NX3000 has 6 disk ...
Mircea Chirea's user avatar
9 votes
6 answers
12k views

Recommendations on ZFS on FreeBSD as a NAS box?

Please note that the answers on this page are from 2009, and should not be relied on as gospel. If you have a specific question about zfs then please click the Ask a Question button and ask a specific ...
grieve's user avatar
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9 votes
2 answers
19k views

SSH access to Apple Time Capsule

Is there any way to install or activate sshd in an Apple Time Capsule in the way you can download dd-wrt and install custom firmware on a netgear router? I'd like to enable sshfs access to Time ...
sal's user avatar
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8 votes
4 answers
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What is "Enable Bitmap" on my Qnap NAS?

What is "Enable Bitmap" on my Qnap NAS? Will it allow me to recover data in case of failures?
Pitto's user avatar
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8 votes
2 answers
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Array free space requirement

The general rule of thumb is don't use more than 80-85% of your capacity, otherwise performance degrades sharply, and other bad stuff may happen. On a 8TB array, this comes out to around 1.6TB of ...
SnakeDoc's user avatar
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8 votes
2 answers
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Moving Hyper-V virtual disk to SMB share gives file not found error in the end

I want to move some virtual disks to from an old ISCSI disk (old NAS) to a new SMB share but for every disk it gives a file not found error in the end and gives the location of the disk on the SMB ...
aardbol's user avatar
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8 votes
1 answer
17k views

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

Related to: The Network folder specified is currently mapped using a different user name and password However, I am not currently connected to the network location already. I if type net use I get ...
Douglas Gaskell's user avatar
8 votes
4 answers
3k views

What Makes Cloud Storage (Amazon AWS, Microsoft Azure, google Apps) different from Traditional Data center storage networking (SAN and NAS)?

Some confusion because of my question so to make it simple : "What kind of storage do big cloud providers use and why?" As far as i understand, however I am not able to find any kind of official ...
Berkay's user avatar
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7 votes
12 answers
9k views

Best way to build home NAS with redundancy [closed]

I need a NAS device for my home network to get these high value files off my laptop (family photos, music, coding projects, etc.). My goal is cheap and reliable. I have a spare old PC laying around ...
spoulson's user avatar
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7 votes
3 answers
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What is the use-case for NAS on a mid-to-high end storage array?

Many large storage vendors (EMC, NetApp, etc) provide storage equipment that does NAS in addition to FCP, FCoE, or iSCSI. When would it be appropriate to use the NAS functionality of these boxes? In ...
MDMarra's user avatar
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7 votes
3 answers
1k views

Recommendations: configuring a 10GbE NAS stack for virtualisation storage

I'll try as hard as I can to word this so it is not considered a shopping list. We have been successfully running a dev/test ESXi environment for some time, with a couple of Dell PE2950III servers ...
jimbobmcgee's user avatar
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7 votes
2 answers
10k views

Malformed rsync command on ReadyNAS

I'm trying to set up rsync backups on my ReadyNAS and I'm getting the following error: ERROR: The remote path must start with a module name not a / This error is accompanied by the following ...
Jason Swett's user avatar
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7 votes
2 answers
11k views

Tape Storage - How do I setup a tape backup system for use with my NAS

I currently have a QNAP NAS with a raid 5 config (~600gb storage) but don't have a reliable backup solution. I've heard great things about tape backup systems (reliability, durability, etc..). How ...
John Himmelman's user avatar
7 votes
3 answers
4k views

Linux: echo 3 > /proc/sys/vm/drop_caches takes hours to complete

I have a Thecus N8900 NAS, which is a Linux based file server, providing files via NFS to six clients. For some reason that Thecus support has yet to explain, it runs a script that checks /proc/...
rmm's user avatar
  • 81
6 votes
2 answers
898 views

Suggestions for a NAS for VMware storage [closed]

I have been looking at Openfiler, and it appears to be a great open-source solution. I haven't seen very much documentation on limitations of OF. We are by no means a Fortune 500 company (yet:) so our ...
Chase's user avatar
  • 472
6 votes
2 answers
287 views

Information on Windows Home Server [closed]

I have been wrestling with whether to invest in a Windows Home Server (WHS). While the positives are pretty apparent: backups, remote access, low power consumption; I have not found a lot of ...
ahsteele's user avatar
  • 375
6 votes
1 answer
8k views

Can't get rsync over sftp to work

I'm trying to set up a backup system from an Ubuntu server to a Synology NAS (DS413j) using rsync and sftp. I have created a user for this that we can call ubuntu-backup. I have a directory in ubuntu-...
Patrik's user avatar
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6 votes
4 answers
9k views

SAN or NAS 100-200TB - where to start looking? [closed]

I'm starting a project to consolidate a bunch of data and make it available on our LAN. I'm thinking that we may have a need for anywhere from 100-200TB at any one time. What factors should I be ...
Marc's user avatar
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6 votes
2 answers
2k views

Mirroring 2 Host with their own local storage

I'm trying to decide between 2 infrastructures. 1. 2 Servers host that point to a NAS 2. 2 Servers that mirror each other with their own local storage. Infrastructure Requirements: 50 TB of storage,...
Derek Welton's user avatar
6 votes
1 answer
7k views

Synology and Active Directory - "no logon servers available"

I have a Synology Diskstation DS412+ here configured for Active Directory authentication on the shared folders. I have a shared folder that our backup software writes backups to (so, CIFS). This all ...
Nathan C's user avatar
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6 votes
3 answers
7k views

At rest encryption with a SAN?

I would like to make sure at-rest encryption is done in one place and correctly. If there's shared storage, that seems like the right place rather than DAS. Mainly I'd like to cover the case of ...
purplemonkeydishwasher's user avatar
5 votes
3 answers
5k views

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

https://en.wikipedia.org/wiki/Clustered_file_system#Network-attached_storage says Network-attached storage (NAS) provides both storage and a file system, like a shared disk file system on top of a ...
Tim's user avatar
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5 votes
3 answers
27k views

Should I use a NAS for file sharing, or just Windows network share folders?

We have a semi-corporate environment with about 25 users. Most machines are Windows7 but there are some Macs on the network, too. We want to set up some location (on a Windows server with lots of ...
bgmCoder's user avatar
  • 726
5 votes
2 answers
5k views

NAS device claims drive in a RAID is degraded but S.M.A.R.T. says it is fine

I have a Synology DS213 with two 600GB drives in RAID 1. Last night the device reported that my second drive had become degraded and that I should replace it. When I ran a extensive S.M.A.R.T. test ...
Nathan Villaescusa's user avatar
5 votes
5 answers
37k views

Disk IO slow on ESXi, even slower on a VM (freeNAS + iSCSI)

I have a server with ESXi 5 and iSCSI attached network storage. The storage server has 4x1Tb SATA II disks in Raid-Z on freenas 8.0.4. Those two machines are connected to each other with Gigabit ...
Esa Varemo's user avatar
5 votes
4 answers
4k views

Setting up a RAID 5 with expansion in the future in mind

I am setting up a NAS box, but money is a bit short right now. I am planning on getting the box up and running with a boot drive, then 3 for a RAID 5 config with some lower end drives. I was ...
Jess's user avatar
  • 409
5 votes
6 answers
684 views

Capacity Optimization / Deduplication Options for Primary Storage

I'm exploring options for making more efficient use of our primary storage. Our current NAS is an HP ProLiant DL380 G5 with an HP Storageworks MSA20, and one other disk shelf which I'm not sure what ...
Stephen Denne's user avatar
5 votes
1 answer
914 views

How much space NAS snapshots consume?

I am trying to understand how snapshots on NAS work. Let's say that I have a 10GB share on NAS. I create a 1GB file. A daily snapshot is taken. After that I delete the file, but the snapshot remains. ...
Alex's user avatar
  • 153
5 votes
1 answer
3k views

Is using a NAS with hot swap disks an effective way of cycling backups?

We are looking at improving our backup solution. We don't have a huge amount of data to back up (currently ~500GB) which is backed up nightly onto an external HD. We have 3 of these HD, with one going ...
kafka's user avatar
  • 547
5 votes
1 answer
3k views

Can you create a glusterfs with existing data in a directory?

I'm looking into convert a single server/comp into the start of a glusterfs distributed system. I already have a directory mounted on this server of 24TB RAID. I want to use this initial computer to ...
Joey's user avatar
  • 151
5 votes
1 answer
3k views

Synology volumes vs shared folders

What is the benefit of making more than 1 volume on disk group on Synology DiskStation? Or, in another words, what is the benefit of organising data into a) many volumes vs b) many shared folders on ...
Krzysztof Przygoda's user avatar
5 votes
1 answer
10k views

Reconnect Attempts for CIFS share

I have a CIFS share mounted in the FSTAB on Ubuntu server, which connects to our NAS and works without issue. Last night we had an issue with the SAN for about 12 hours. We corrected the problem and ...
Davin's user avatar
  • 51
5 votes
2 answers
2k views

Point a subdomain with CNAME to a DDNS subdomain?

I got a Synology NAS, with different virtual hosts, so i got a DDNS (user.synology.me), let's say the virtual hosts are server1, server2 and server3, so i can access them using server1.user.synology....
Spider351's user avatar
5 votes
3 answers
444 views

What causes a switch port to receive data not destined for it?

We are having an intermittent fault which is effecting one of our control systems on one of our HP Procurve switches. For some reason, this PLC (10mbit port - 192.168.6.56) which is attached directly ...
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