Primarily questions about disk storage, sometimes questions about application storage or cloud storage. Always questions about storing data.

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3
votes
3answers
4k views

LVM spanning over multiple disks: What disk is a file on? Can I lose a drive without total loss?

I have three 990GB partitions over three drives in my server. Using LVM, I can create one ~3TB partition for file storage. 1) How does the system determine what partition to use first? 2) Can I find ...
0
votes
1answer
87 views

Best span size for 12 x 2TB drives in RAID10

We have just taken delivery of a new JBOD chassis, with 14 x 2TB NL-SAS drives - 2 have already been earmarked for enclosure spares, so we have 12 drives available. I have several options for setting ...
5
votes
4answers
1k views

Do you use SSD in a production environment yet? [closed]

I'm not asking whether or not it's worth the money, as in Question 2425. I'm interested to see the level of acceptance in the production world up to now. Money can certainly relate to the answer, ...
0
votes
1answer
574 views

Cabling order on ProLiant DL180 G5 with SmartArray P800 and 3 x MSA 60 enclosures

For some reason I need to power up a system full of data without having any documentation about cabling. I have : 1x Proliant DL 180 G5 with P800 3x full loaded smart array 60 with probably 2 ...
1
vote
1answer
77 views

Does the LSI 9211-8i add any data structures of its own when used in pure HBA (JBOD) mode?

I'm looking at adding some disks to one of my systems, for which I need to add an offboard HBA. Looking around, I came across the LSI MegaRAID SAS 9211-8i (LSI part number LSI00194) which looks quite ...
2
votes
1answer
49 views

Ubuntu Windows Azure mass storage

I just started using Windows Azure service. I created an XL machine, and I got 28GB on the primary partition and a whopping 600GB on the temporary partition. My application needs a lot more space ...
2
votes
4answers
3k views

How much storage space is required for an Exchange Mailbox Server? MS Calculator must be high

I am building an Exchange 2010 environment and am trying to determine the amount of storage that will be required for the 2 Mailbox servers. Here are the specs: 2000 user mailboxes (per mailbox) ...
3
votes
3answers
43 views

Are storage pools basically another term for JBOD?

I am reading up on Storage for Windows Server 2012 R2 and I am trying to understand the purpose of Storage Pools. The way they make it sound is that you can create one big expandable ever growing ...
4
votes
8answers
206 views

Our web-developers have a project that requires accepting file-uploads. What should I ensure is covered?

A recent project requires one of our websites to accept file uploads from (logged in) users (primarily images and possibly some video). What are some (generic) things we need to take into account, ...
2
votes
2answers
3k views

Database (MySQL) and SSD lifetime - “lot” of writes to DB

In company where I work we started using SSD for our internal 3 GB MySQL database Difference in perfomance is HUGE, which is great. What I am worried about is lifetime of SSD Writes to DB are ...
-1
votes
1answer
192 views

Monitoring a cluster storage on Microsoft Windows Server 2012 R2 HyperV via SNMP

As a part of my task of monitoring our whole server environment it is planned to check the cluster storage (cluster shared volume, csv) of our HyperV cluster with Check_MK/Nagios3. Exactly needed is ...
-8
votes
2answers
200 views

Server destroying and burning my Hard Drives [closed]

Before I start, let me inform you that I have been working as an IT Manager for large international companies for my whole life, and I have received masters degree from IT technology. I therefore ...
0
votes
1answer
32 views

Storage tiering and SLA models

I've started looking at switching storage charging models. Historically - it's been purely per-gig, in a big shared pool. But I'm looking at extending the model, and looking at tiering storage ...
0
votes
0answers
28 views

VHD to physical disk conversion failed

We have had a happy HyperV running with several VMs until motherboard crashed. On another MB we had to install a new OS, of course HyperV does not see VMs. Tried to use VHD2Disk using a blank ...
0
votes
2answers
2k views

HP MSA2000, how detect faulty disks?

I have an HP MSA2012fc, it happened a few times that my large vdisk (6x 1TB raid 5) get offline, seems some disks are faulty, the event log only shows 2 of the drives had "bad blocks" and some disk ...
1
vote
1answer
97 views

Convert RAID from Mechanical Disks to SSD?

Any issues with converting a Mechanical Disk RAID to SSD by replacing the drives one-by-one? I couldn't find anyone online who has done this, so let's make this the place to post about it. If you ...
-1
votes
1answer
34 views

How to change volume mount

I have two volumes in my EC2 ubuntu instance: NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT xvdb 202:16 0 40G 0 disk /mnt xvda1 202:1 0 400G 0 disk / I want the 400GB one to be the main ...
3
votes
2answers
107 views

FC-Multipath: Which path_selector performs best?

So I learned that since Red Hat 6 it is possible to choose between 3 algorithms for loadbalancing between different paths to my FC-SAN, the default dumb round-robin - and new - queue-length and ...
2
votes
2answers
83 views

NetApp filer - lots of 'low water mark' CPs triggering on idle filer

I've 4 NetApp 2240-4 filer heads. They're single chassis 'cluster in a box' so two separate units. Over the last few days, at about the same time - all of them started logging a LOT of Low water ...
14
votes
6answers
3k views

Cost effective, long term archival of video and image data? ~50 TB

My lab is in the process of setting up a small server that holds data (mostly video and image data, plus a few documents) for the project our group is working on at a moment in time. Historically, ...
34
votes
11answers
12k views

Does an unplugged hard drive used for data archival deteriorate?

If I were to archive data on a hard drive, unplug it, and set it on a (not dusty, temperature-controlled) shelf somewhere, would that drive deteriorate much? How does the data retention of an ...
2
votes
1answer
271 views

VMware ESXi <> Synology NFS Share (Physical Switch Redundancy)

This is my storage network: ESXi Host(Dual 10gb NICs) >> 2xNetgear xs712T >> Synology RS10613xs+ (Dual 10gb NICs) ESXi vmnic1 >> NG Switch 1 >> Syn NIC 1 ESXi vmnic2 >> NG Switch 2 >> Syn NIC 2 ...
0
votes
2answers
504 views

To what degree can I trust a given storage device?

Apologies for the horribly vague question... What are the error rates for reading and writing to storage devices, and do our file systems and OS's account for this? I've had bad sectors on my ...
2
votes
2answers
233 views

Performance for ZVOLs presented over iSCSI?

I have the following setup for testing: HP Microserver N36L (Dual-core low-power Athlon64) 8GB ECC RAM 2-port Intel Gigabit NIC 4x3TB WD Green (5400 RPM?) 1 sata disk for OS image (FreeBSD 10.1) ...
0
votes
1answer
670 views

Install SAS/SATA backplane in Dell PowerVault 220S

Is the backplane of a Dell PowerVault 220S svc tag 3sdpcb1 (14 drive, 80 pin hot swap scsi) upgradeable to a SAS/SATA backplane & controller card replacement? The unit already seems to be quite ...
0
votes
0answers
49 views

Btrfs data single mode behaviour when on of devices fail

I want store non critical data on more HDDs (one 2 TB and two 500 GB devices) using Btrfs filesystem with distributed metadata but single data. As I have said, data will not be critical, so if one ...
0
votes
1answer
41 views

Will a NAS server be adequate for this intended usage?

I'm looking to get a small server to predominantly act as a content storage network drive but I will also want to be able to run Ubuntu or even just the most basic Linux distro. It will have XAMPP and ...
1
vote
2answers
2k views

anyone using coraid storage: ATA over ethernet?

can these enclosures be populated with SATA or SAS drives purchased elsewhere? recently Dell has made custom size slots on their PE T710 servers on which you could only place drives purchased from ...
2
votes
1answer
162 views

XenServer 6.2: reattach SR but all disks have no description

I have recently reinstalled XenServer on my server. All the VHD files were stored on my NAS via NFS, so I re-added the NFS SR after reinstallation. However, all my VMs seem to be missing, and the ...
126
votes
6answers
15k views

Are SSD drives as reliable as mechanical drives (2013)?

SSD drives have been around for several years now. But the issue of reliability still comes up. I guess this is a follow up from this question posted 4 years ago, and last updated in 2011. It's now ...
-1
votes
1answer
47 views

One SAN connecting to Hyper-V and VMware [closed]

my customer currently has two hypervisor types in place - using VMware for Linux systems and Hyper-V for Windows. They currently have different storage infra for each of these platforms which cost ...
3
votes
1answer
38 views

Undo adding disks to a RAID-Z Configuration

I've started running out of space on one of my data pool and decided to expand it by adding some extra disks. Below is what it looked like before extending: NAME STATE ...
0
votes
2answers
70 views

Extendable RAID storage system

I am currently building a storage unit for our office. It is rather low budget at the moment, but it needs to be extendable. basically we have a huge database that will grow over the next few months ...
0
votes
0answers
169 views

VDS fails to write boot code on a disk during clean operation

We have windows 2008 enterprise server and one of the logical disks D: is missing. On the device manager , whenever we open the window, it asks to choose for MBr or GPT, but choosing neither would ...
2
votes
2answers
744 views

ESX or ESXi as FCoE or ISCSI or NFS target?

Is is possible to set up ESXi or more expensive ESX server as a storage target (FCoE, ISCSI or NFS, in that order) for other ESX servers? If so, how?
2
votes
3answers
871 views

Can you explain why I shouldn't serve PHP off Gluster?

There's a good chance that I'll end up running Drupal on several front-end nodes over the next six months, and I'd like to know if there is a good reason not to have a single instance of Drupal stored ...
2
votes
1answer
76 views

Exchange 2010 Whitespace after Archive move

We have multiple Archive Mailbox databases. I have had to create a new one with 500GB of Data space for the archives and 150GB for the logging files. The problem I am having is that even after ...
1
vote
3answers
3k views

Why can't I extend my dynamic volume over a second drive?

We have a server that is running on hardware RAID1. We've needed to add additional disks, but unfortunately the raid controller doesn't support RAID10. So we've added another RAID1 array, and want to ...
2
votes
3answers
1k views

how do I find out what part of my ec2 storage is ephemeral

This may be a silly question, excuse my ignorance. I have an instance running like this: Does Root Device : EBS mean my entire system is on EBS? I've configured apache and a perl app here, all my ...
26
votes
5answers
4k views

Do I need to RAID Fusion-io cards?

Can I run reliably with a single Fusion-io card installed in a server, or do I need to deploy two cards in a software RAID setup? Fusion-io isn't very clear (almost misleading) on the topic when ...
0
votes
1answer
57 views

Move space from one volume to other

I have one setup where / has 50G space. I want to increase space for /. [root@testsyst ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_testsyst-lv_root ...
3
votes
3answers
626 views

What are the differences between consumer grade SSDs and the much more expensive enterprise SSDs?

I am in need of a terabyte or so of storage space for Lucene indices on a testing server. I'm having a hard time differentiating between disks like the Samsung 840 evo for about $450 vs SSDs with ...
2
votes
1answer
74 views

“Hot data” and erasure coding: how to know if it is efficiently handled?

It is well known that erasure coding adds extra complexity because of encoding and decoding operations. Due to this drawback, most of cloud services recommend to use data replication for hot data and ...
2
votes
2answers
242 views

HP ProLiant ML350 G6 RAID 1 disk compatibility

We are running an HP ProLiant ML350 with a RAID 1 set up on two identical 300GB 6G SAS 10K rpm SFF (2.5-inch) Dual Port Enterprise HDDs and a third acting as a "hot spare" - HP part # HPQ-507127-S21. ...
7
votes
5answers
1k views

ML350 G5 - upgrade hot swap drives to 6 Gb/s?

I support a non profit. They got an ML350 G5 donated to them and I immediately put it to good use for them :) It came with four HP 300GB 15K SAS drives - and of course, they have all now failed. I ...
2
votes
2answers
618 views

What is good book for administration & configuration of Storage logical arrays? [closed]

I am looking for a book which can explain pros and cons of different combination of configurations/policies of storage Arrays and may also suggest some best practices for certain scenarios for e.g. ...
1
vote
5answers
353 views

Pool storage on multiple ubuntu Servers?

Say I've got.. 5 servers, each server has a partition with 50GB's of storage. Is it possible for me to combine these 5 partitions and then mount them as one on a 6th server?
0
votes
2answers
58 views

What is optimal sql server cluster storage solution?

I have been assigned a project where sql server is running on a single server with single raid 1 volume. This setup has worked fine until hardware failure resulted in about a day worth of downtime ...
0
votes
3answers
168 views

~50tb of storage in Azure presented as a single Windows File Share

I have googled, the closest thing I have found so far is another SF question here: Azure Storage limitations The Goal: Move approx 50TB of storage to the cloud, present that storage as a standard ...
1
vote
2answers
1k views

When reading SSD drive specs, what's the difference between MB/s and IOPS?

I'm trying to find a suitable SSD drive for my database server (postgres on debian 7 amd-64), and I find that for some SSD drives, while read speed is specified in MB/s, write speed is in IOPS. To ...