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

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2
votes
1answer
229 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
489 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
125 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
662 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
42 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
40 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
1k 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
142 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 ...
125
votes
6answers
14k 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
36 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
33 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
66 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
1answer
708 views

OpenStack Cinder: iSCSI login negotiation failure after reboot

I have a Cinder storage and controller node running on the same CentOS 7 box as Nova compute. Everything worked fine, until I rebooted. Now my instances can't mount volumes and I get the errors below. ...
0
votes
0answers
123 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
742 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
867 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
65 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 ...
0
votes
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
3k 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
0answers
13 views

On-Site Backups: JBOD on Existing Array, or 2nd Array?

We're reconfiguring our on-site backups (using Veeam if it makes any difference) and I have a decision to make. I can either purchase an entire new disk array and use that, or I can purchase a JBOD ...
0
votes
1answer
43 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
406 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
72 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
225 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
612 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
337 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
54 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
119 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 ...
6
votes
2answers
29k views

What is the fastest and safest RAID combination for SATA drives?

I wonder what is the fastest and safest RAID combination for SATA drives and general use (some write, mostly read)? RAID 0 is fast but utterly unsafe, RAID 1 is safe but slow, RAID 5 is safe but not ...
2
votes
1answer
136 views

esxi passthrough storage adapter

I run ESXi 5.1.0 (HP version) on HP ProLiant ML310e G8 v2. There are 2 Storage Adapters: Smart Array P222 Dynamic Smart Array B120i Storage Adapters are visible in ESXi/Storage Adapters. Storage ...
1
vote
2answers
192 views

How to migrate a ZFS filesystem to use compression?

Question at the bottom. I have several ZFS file system I would like to use ZFS compression, but since enabling the compression will only affect new data written to the file system, I would like to ...
1
vote
0answers
200 views

Best practices in connecting EMC VNX iSCSI storage [closed]

We have an EMC VNX5200 with 2 service processors, each having 4 iSCSI ports, 1 data mover (with 4 ports) and a control station, all of which is plugged into two stacked switches. What are the ...
1
vote
0answers
69 views

10K SATA vs 10K SAS - SBS Server Upgrade [closed]

We are upgrading the storage on a SBS2011 server. It currently has a single 7,200RPM SATA drive (don't know the model). Small office with less than 10 users. Budget is low so the original plan was to ...
3
votes
1answer
140 views

Hyper V 2012 and SQL Cluster Live migration

I've been doing allot of searching and even asked around here at the office without a good answer. I would like to know, within Server 2012 R2 Hyper V, can you or can not do a storage migration of a ...
9
votes
2answers
179 views

EMC VNXe GNU Source Code

Does anyone know where EMC host their GNU source code for VNXe products? We are tired with calling Delhi/Idaho for them to dial in to fix trivial issues and would like to figure out the algorithm of ...
12
votes
1answer
16k views

KVM and Libvirt - How do I hotplug a new virtio disk?

I am trying to hot-add a file-based disk to a running KVM virtual server. I've created a new disk from scratch using the command dd of=/home/cloud/vps_59/test.img bs=1 seek=5G count=0 and I was ...
2
votes
1answer
34 views

Abstract physical drives to create a resizable raid array: is it possible?

I want to set up two hard drives with a portion of them set in raid1. I want that portion to be scalable too, as logical LVM volumes are. Is it possible to abstract physical volumes or to create an ...
0
votes
1answer
117 views

Unclaimed disk space but no actual physical disk present

I am working with Ubuntu server 12.04 and earlier this week we detected a bad disk in /dev/sdl. I was not able to query its mount point and it also had failed SMART tests. Today I brought a brand new ...
1
vote
1answer
49 views

Access a share on a server using another servername

We've recently moved to a new office, and merged our network with a bigger one (Trust between our domains), and now we are using the storage box of the bigger network. This poses a problem for me: My ...
4
votes
3answers
4k views

Why did robocopy cause my Windows 2012 server to hang last night?

I'm in the process of decommissioning an old 2003 server, which acts as a file server, and am just attempting a dry-run of migrating the file repository over to a new Windows Storage Server 2012 box. ...
2
votes
1answer
95 views

SCSI disks capped at 40 MB/s

I have a batch of SCSI disks and a controller; the drives are HP 72,8GB 10k RPM Ultra320 SCSI (model number BD07296B44), the controller is an Adaptec AIC-7892A U160/m, the issue is that I can't get ...
37
votes
12answers
26k views

ZFS vs XFS

We're considering building a ~16TB storage server. At the moment, we're considering both ZFS and XFS as filesystem. What are the advantages, disadvantages? What do we have to look for? Is there a ...
-1
votes
2answers
69 views

Parallel disk seek with JBOD

I'm looking to build a 80 TB file based storage system. Ideally, I'd like to do this with a large JBOD and one server with a lot of cores. My question is: Will JBOD containers (like Intel's) allow ...
1
vote
1answer
248 views

Unable to ping between ESXi host and Netapp storage on the same switch

I am unable to ping between ESXi host and Netapp controller that are both connected on the same switch and configured for private IP addresses. Yet I CAN ping between 2 Esxi hosts and between 2 ...
1
vote
3answers
592 views

Identifying failed hard drive in RAID

I have a server which is running customized version of Debian. It is attached a sun storage raid. It has very limited tools and installing new tools is not allowed. :( This message I see in dmesg: ...
1
vote
3answers
202 views

Long running VMWare snapshots are bad… but what about VMDKs on a ZFS\LVM snapshot?

The VMWare KB and multiple blogs state that long running snapshots are bad for both performance reasons and integrity. They have valid points. Granted this is not with ESXi but rather ...
17
votes
3answers
5k views

How effective is LSI CacheCade SSD storage tiering?

LSI offers their CacheCade storage tiering technology, which allows SSD devices to be used as read and write caches to augment traditional RAID arrays. Other vendors have adopted similar ...