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

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Does Windows Server Storage Server have problems with RAID6 iSCSI?

I adopted a virtual Windows Server 2012 Storage Server that has 4 QNAPs attached via iSCSI. The storage environment is connected via iSCSI through a Cisco SG300 (Gigabit); jumbo frames is not ...
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1answer
34 views

What speed should I expect from an MSA60 attached to an HP p212

I have an HP DL380 G5 with a P212 controller and a 256MB cache card/battery. The P212 is hooked up to an MSA60 enclosure, which for testing, I have populated with 8x 500GB 7.2k SATA disks. I know ...
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1answer
23 views

Dell R730 with QLogic 2660 16Gb FC HBAs connected to a Brocade 300 8Gb FC Switch? Will it work?

We have a standard shop with 3x Hypervisors running VMware vSphere 6.0. The hypervisors are currently connected via 8Gb FC link to a Brocade 300 (8Gb FC) switch, which is then connected to our ...
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1answer
40 views

Selecting an SSD to act as boot volume in an HP server

A question I recently asked regarding the use of enterprise 10k vs. 7.2k midline SAS disks led to some suggestions that the use of a mirrored pair of SSDs as a boot volume can make sense because: ...
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0answers
14 views

Is mapping a docker volume to the host “bad” for production?

My main need: to be able to map a volume defined in a Dockerfile to a different physical storage tier (which is already a logical volume in the host). This volume is in /data in the host OS: # df -h ...
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1answer
29 views

How to distribute file storage to a different filesystem with Ubuntu 14.04?

First of: I just got started using CLIs to manage a whole server, sorry if this question is stupid, but I couldn't find any solution to this. I ran into a problem with apt-get -f install, because my ...
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1answer
43 views

How to decide between a docker volume container and a docker volume?

After reading the docs I found myself somewhat confused as to how best to manage productive application/service data. There seem to be 3 options: Simply map volume to host directory (i.e. -v ...
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2answers
17 views

Nginx - Caching/processing of data when uploading a file over a reverse proxy

I am running multiple Virtual Machines (Proxmox) which each have limited storage amounts. As I am also running a File-Uploading service, I am interested if a Reverse Proxy needs more than 30GB of ...
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1answer
30 views

How to hook up a Supermicro JBOD expander to an HP DL380

I'm totally new to the subject of high-availability / distributed storage, and have to figure out a solution for a particular project. I am looking at using Windows Server 2012 R2 Storage Spaces to ...
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1answer
19 views

Management interface/SSH no longer working for HP MSA storage array

I'm having issues accessing a storage array through the web interface/SSH on a MSA2324sa. I already emailed HP however I was wondering if anyone has ran into this. When I try to access the interface ...
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3answers
2k views

Can “enterprise” drives be safely replaced by near/midline in some situations?

When specifying servers, like (I would assume) many engineers who aren't experts in storage, I'll generally play it safe (and perhaps be a slave to marketing) by standardising on a minimum of 10k SAS ...
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2answers
336 views

ZFS 100TB hardware setup

We received a quote for the following server setup : Intel Xeon E5-2609V2 2 x WD RE 2TB SATA III 34 x WD RE 4TB SAS II 32 GB memory (ECC) LSI MegaRAID 9271-8i bulk, 8 x SATA III/SAS II internal ...
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1answer
20 views

IOmeter: Avoid caching and Raw Devices

When testing IOmeter I know always need to be avoid hitting the cache if the logical drive with the OS is testing, some I have some question about it: Do I need to avoid the memory on the controller ...
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0answers
22 views

SAS expander or better controller?

In the past, servers I've put together have all had 8 or fewer disks, so I've not had to give the storage controller much thought - a standard controller like the P440ar (my experience is with HP) ...
0
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1answer
55 views

Are bcache and/or dm-cache considered stable for production in 2016?

I would like to use linux SSD caching (dm-cache or bcache) with Debian Jessie production servers. (kernel 3.16) My question: Are dm-cache and bcache modules reliables in linux 3.16 ? Do I need to ...
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0answers
13 views

Purpose of '.status' VHDs that are created when booting an Azure VM

I'm using the Portal (portal.azure.com) and choosing the Resource Manager view when booting an Ubuntu VM on Azure. I'm seeing that there are two vhds that are created as part of booting the Instance. ...
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0answers
59 views

Docker no space left on device [closed]

I have a Fedora/couchdb image running on my home server for the purpose of storing data collected for research. However, I recently had a problem accessing the CouchDB interface and so I attempted to ...
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0answers
13 views

Best practices for sizing RAID 6 arrays? [duplicate]

I'm wondering what the best practices are for sizing raid 6 arrays. For example: At what point is it better to use multiple arrays or RAID 60? is spindle count the only factor? If reliability is ...
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0answers
31 views

Expanding JBOD with SAS extenders

My project is expanding 24-HDD ZFS box by adding 45-drive box with option to add another 45-drive box later (all are JBODs). Host box (24 HDDs) is Supermicro with single port expander backplane and ...
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0answers
13 views

RHEL 5 LVM: “dmsetup info” showing “Tables Present” as None

We have running a huge Live Setup on RHEL 5 and Storage LUNs configured on LVMs. Until recently the server is running fine but we have triggered a reboot over the machine for some maintenance purpose ...
0
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1answer
20 views

Finding out which is the failed drive on Intel SRCASRB RAID Controller

There is very old server with Intel RAID SRCASRB Controller with 4 x WD5003ABYX-0 500GB drives connected to it in RAID5 array. One of those drives has failed and I want to replace it. Since server is ...
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1answer
19 views

Distribute application as virtual machine but require external storage

I'd like to distribute a Web application as a VM image in order to make distribution, installation and maintenance as easy as possible for customers (virtual appliance). This image should include ...
4
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2answers
76 views

Can increased disk throughput increase CPU utilization?

We recently upgraded the storage in our data center and migrated all our production systems to it. We noticed that in one machine (an HP_UX IA-64 Oracle database server for SAP), the CPU utilization ...
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0answers
19 views

How can I recover 'missing' storage on a non-system volume?

I have a Windows 2008 R2 server with several RAID-1 volumes. One of the volumes has a large amount, several hundred gigabytes (about 1/3rd of the volume) that is unaccounted for. WinDirStat shows it ...
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1answer
43 views

How to get live scsi traces from Vscsistats?

Here are things I already know, using vscsistat -t option I can get command traces for "VM/.vmdk" on ESxi. Steps to get scsi traces are: Start capturing traces, On Successful starting will ...
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0answers
15 views

Xen server storages unplugged [closed]

In order exit a xen VM and a domain from halt state I destroyed the domain and restarted the VM. Now in xen centre I see all the storages disconnected. I tried to repair using xencenter but no luck. ...
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0answers
10 views

remote location mounted with mount.fcifs doesn't show in FTP

I am using Centos 6.6 and I mounted a remote location by this command: mount.cifs -o user=adrian,pass=1234,uid=adrian_site,gid=psacln //server/path /local/path So I specified the user and group, in ...
2
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1answer
68 views

Make ceph minimize spread of file parts over OSDs

I am considering an option of ceph as distributed filesystem for my home-made MAID (massive array of idle drives). As far as I understand, Ceph oriented for cluster use and spread data evenly over ...
3
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0answers
75 views

VMware ESXi and Intel DC3700 (NVMe) Poor Performance Even With Intel's Driver

I'm running VMware ESXi 6.0.0 with the Intel DC3700 800GB. My VM is running Windows 10 x64 with 8GB RAM and 4CPU Cores. The entire VM is 32GB and sits on the SSD. I'm using CrystalDiskMark at 1GiB ...
1
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1answer
29 views

HDD seq. read performance

I read the specs for one of the latest Hitachi HDD, https://www.hgst.com/sites/default/files/resources/USC10K1800_ds.pdf . It indicates a speed of SAS 12 Gb/s which is 1.5 GB/s. Is it the sequential ...
1
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1answer
50 views

local storage on proxmox cluster, how to make it really local?

I am playing a bit around with proxmox cluster. I have 2 servers. One of them, lets call it Virt01, has an extra disk, for storage. I created a new extra local storage withis thuis disk, but proxmox ...
9
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1answer
157 views

Mixing HBAs in a failover cluster?

I have a two server failover cluster, and for various reasons - they're on mismatched hardware. One has Emulex HBAs installed, the other Qlogic. I'd be twitchy about using two different ...
1
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2answers
52 views

Does the max-80%-use target suggested for ZFS for performance reasons apply to SSD-backed pools?

The Solaris ZFS Best Practices Guide recommends keeping ZFS pool utilization below 80% for best performance: Keep pool space under 80% utilization to maintain pool performance. Currently, pool ...
1
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1answer
49 views

RAID 6 >80% Highest Active Time with small I/O

I have a RAID 6 with 18 disks. It is used as a storage for small images(5-500Kb). It is about 6TB full of data. I have an utility that reads that images to the ram and then send it over network. I ...
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1answer
26 views

exchange 2010 storage on hyper-v

Working on planning new Exchange 2010 to migrate my existing email infrastructure on it. I have ~120 users with ~3-8 Gb mailboxes and a lot of public folders (~80 Gb). Total used mailbox space on ...
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0answers
60 views

Xenserver 6.5 Live Storage Migration

In my xenserver environment I have an LVM over ISCSI storage repository (SR) and I have another SR which is an NFS share setup on a synology server. To be clear, all servers are in one resource pool. ...
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2answers
51 views

vCenter Thin Provisioned disk usage calculations

I'm managing a number of Thin-Provisioned VMs in vCenter 5.1.0. Each contains one virtual Harddisk. We run a pretty tight ship in terms of allocating storage, so the difference between 1 or 2 GBs is ...
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0answers
32 views

Changing content storage path for Azure pack websites

I'm wondering if it's possible to change the content storage location within Windows Azure pack websites. I want to change my existing cloud's storage from a standalone Windows file server to a Linux ...
2
votes
1answer
34 views

Why are some disks and some are LUNs?

Question at the bottom. I would like to use a Sun StorageTek 6100 as JBOD for ZFS, and so I have connected it to OmniOS over FC with a QLC2462 HBA. The disk array doesn't have a controller tray, just ...
2
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1answer
39 views

IBM BladeCenter S storage module

I am new to this forum and have a question I'd like to ask. I have a client who is running a BladeCenter S, which includes a 6-disk Storage Module (44Y1405/44E8057). The problem they have is that ...
-1
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1answer
241 views

Ubuntu + ZFS vs Rockstor [closed]

I have a personal fileserver at home with 6 HDs: 1 500 GB one for the OS 1 4 TB one for temporary data four 2 TB ones that we want to configure in some sort of RAID 5 fashion It looks like I have ...
-1
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1answer
38 views

Removing all hw raid from Sun server

This post is about the same server as this post, where multiple disks were in a LUN, and then ZFS was used to make the ZFS pools. I would like to use the 6140 disk arrays as JBOD's on either Linux or ...
0
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0answers
12 views

Debian used + available does not equal size (storage) [duplicate]

I'm trying to find out why /dev/sda1 Used+Avail != Size. I ran a df -h and the output I get is this: File system Size Used Avail Use% Mounted on /dev/sda1 320GB 683M 303G 1% ...
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0answers
17 views

Understanding VMFS storage usage

please help me understand something regarding used and available space on a datastore holding thin provisioned vmdk files. Im having an ESX 4.1 U3 VMFS 3.48 datastore called "storage1". This is ...
0
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1answer
128 views

Azure blob storage custom domain verification - Azure telling me to create CNAME for non-existent address

I want to assign a custom domain name to my Azure blob storage account. In the custom domain setup page it says: You can map a custom subdomain name to your Blob service endpoint. Windows Azure ...
2
votes
2answers
56 views

More Global Spares or dedicated spares

I have 74 x 300GB disk on a HP MSA2324sa. The magic for me is 3 x RAID10 vDisks of 16 drives each. And then 2 x RAID50 vDisks of 10 drives each. That leaves me 6 drives. I could assign 5 dedicated ...
6
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2answers
314 views

What is reasonable storage failover time that most OS (VM) can tolerate?

I have a GlusterFS 2 node 2 replica setup. I am planning to use it as OpenStack instance store, in which the VM disk image is stored. From my tests, if the GlusterFS node which the hypervisor ...
0
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0answers
116 views

Linux LVM replicated Volumes

I am migrating storage arrays, on two sites.The DR site has synchronous block replication from main site that will be cut during the migration, however once the volumes are migrated the replication ...
3
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2answers
1k views

Why does docker-machine clear data on restart?

I'm using Docker Toolbox on OSX. I've created a data volume container for storing persistent data: https://docs.docker.com/userguide/dockervolumes/#creating-and-mounting-a-data-volume-container. I ...
0
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2answers
39 views

Server storage upgrade

I have a windows server 2012 r2 setup with the following storage: 1x 900GB Internal HDD (OS Drive) 1x 1TB USB SSD (Client computer backup drive) 2x 1TB USB SSD (C drive backup - hot swapped weekly ...