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

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1answer
1k views

VMWare 5.1 Datastore in use when trying to unmount?

When trying to unmount a datastore from one of my 4 ESXi hosts, I receive a message that it's in use. The full error stack I see is: Call "HostDatastoreSystem.RemoveDatastore" for object ...
0
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2answers
108 views

Building a small server setup - need storage and reduncy - NAS or SAN? [closed]

I want to build a small server setup. With 2 load balancers, and at first 2 webservers. I need a setup where both webservers would be able to upload and download files from a common storage solution. ...
-1
votes
1answer
68 views

Fast storage for a server [closed]

I have created a search engine which is implemented in Java. I want to put this program to a server and test it. My program is very dependent to disk I/O and any improvements to disks would directly ...
2
votes
1answer
72 views

Update RAID 10 NAS storage

I've got a NAS with 4x500GB HDD in RAID 10. I want to change the actual HDDs to others of 1TB capacity, but I want (if possible) to preserve the data without having to copy it outside the NAS. The NAS ...
5
votes
3answers
703 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 ...
1
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1answer
227 views

New RAID1+0 in P2000 storage

I have P2000 SAS storage with RAID6 configured on 8 disks 1TB 7k2rpm. I want to add RAID1+0 with 4 SAS15K 300GB. The question is, does this storage support this setup? Should it work without any ...
0
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1answer
149 views

WebDAV on server exposing ZFS data from another server

Is it even possible to have WebDAV server hosted on one computer and its pulling the "data" (folders and files and all) from another server? Something like so: CentOS Proxy ...
0
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1answer
319 views

What is the best storage for active-active linux cluster? [closed]

We have a cluster with multiple ubuntu machines which are connected to a shared SAN storage. Initially we were using OCFS2 as file system but we were hit with so many issues and we couldn't find ...
0
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1answer
24 views

Exchange 2007: Storage Build out Suggestion

I'm in the process of rebuilding an exchange environment. The previous admins did not setup the storage or systems properly. Without going into too much detail, there is no storage in the environment, ...
0
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7answers
364 views

Need to physically move a MSA60 over one row in the rack - do I need to power it down? [duplicate]

Possible Duplicate: How to correctly move a server inside a rack up and down Just wondering what people's thoughts are on moving a MSA60 over one rack. I have plenty of free cable slack, ...
3
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2answers
371 views

Linux - Storage IOPS

I have number of MySQL databases, I have used tools such as dstat, vmstat I'm just unable to determine when do I need to add more drives to increase performance. the number of databases are ...
2
votes
2answers
2k views

Hyper-V 2012 and P2000 SAS SAN

Hi I am having major problems setting up a Hyper-V 2012 cluster on a P2000 SAS SAN. Running System Center VMM 2012 SP1 I am unable to see any storage to create my cluster. Has anyone had experienced ...
-2
votes
2answers
83 views

Solution to manage data server with multiple drives

I'm looking for some pointers on the best way to manage a Linux data server, with 20 hard drives and with new files always being added (around 30GB/day). Performance is not important, reliability is ...
1
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4answers
560 views

Do 1 TB Velociraptor SATA drives work smoothly in a Dell PowerEdge RAID setup? [closed]

We're looking at using velociraptor 10k SATA drives in a Dell Poweredge R720. The late-2012 1 TB WD velociraptors seem like a great fit for our situation (need 10s of TBs of storage in a 2.5" format ...
1
vote
1answer
656 views

Reconfigure HP Smart Array RAID 50 with larger drives

We have an HP ML 350 G6 with an HP smartArray 410i controller. Running Ubuntu x64. We previously had 8 146G drives configured as a 820GB raid 50 logical drive. Now I have replaced 4 146GB drives ...
1
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2answers
346 views

Adding raw storage - iSCSI or VMDK?

We have about 10TB of files that we use on our fileserver. I'll be setting up a new server with more space and better backups. We have a SAS box with 24 drives connected to OpenIndiana server ...
0
votes
1answer
650 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 ...
1
vote
1answer
87 views

RAID: is it enough to have n+1 disks in a RAID6 array to match performance of a n disks RAID5 array? [closed]

As far as I know, RAID-6 has an even worse penalty on writes than its cousin RAID-5. But we also know that we can get more performance out of a typical RAID array by having more spindles in it. But ...
1
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4answers
2k views

Why use NAS for file access, why not SAN? [duplicate]

Possible Duplicate: What is the use-case for NAS on a mid-to-high end storage array? SAN is block level, NAS is file level. Block level means applications access blocks,while in file level ...
1
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3answers
100 views

Simple way to extend server disk capacities

What's the least cumbersome way to extend existing server's storage capabilities? I have a SuperMicro custom server and a Dell PowerEdge 2950 and I would like to extend their storage with budget hard ...
1
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2answers
551 views

No drives showing on LSI 2008 SAS + HP SAS Expander

Followin this guide http://www.servethehome.com/supermicro-x8si6-f-motherboard-review-including-onboard-lsi-sas-2008-controller/ I got myself an RPC 4224 case (They are called Inter-Tech in Europe, ...
1
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2answers
84 views

Determine If This Is A Symbolic Link

I'm in the process of getting a second server connected to a Dell MD3000i. I'm trying to do it the exact same way the server before it was setup. It has a folder in the C Drive that goes virtual ...
1
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1answer
280 views

NetApp Flex Volumes (Flexible Volumes)

I have an aggregate with a 150 GB Flexible volume with a 3 TB capacity and a growth increment of 10 GB. If I want to Copy 1.5 TB of data to the volume, it tells me there is not enough disk space. ...
0
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2answers
153 views

iscsi versus non-iscsi san?

We are considering adding a SAN. I have two choices right now, the Dell MD3000 and the Dell MD3000i, 15 x 146Gb san drives. Naturally the latest model is more expensive (2x as much), but can ...
2
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1answer
561 views

Microsoft fail over cluster and storage with raid card

I am looking for some input on a Microsoft fail over cluster implementation on 2012. To use the storage and pools it apparently has to have JBODS if your using a raid card. But the LSI card we use ...
2
votes
1answer
406 views

Configure Windows to Read/Write Shared SAN

I am working on building a NLB cluster to load balance for JavaEE portal. Both are Virtual Windows 2008 R2 and connected via Fiber Channel to an EMC SAN Storage. They should read/write files into the ...
27
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2answers
5k views

Why are enterprise SAS disk enclosures seemingly so expensive?

I will begin by stating that I do not believe this is a duplicate of Why is business-class storage so expensive?. My question is specifically about SAS drive enclosures, and justifying their expense. ...
-2
votes
1answer
249 views

How to setup Load Balancing on DAS (Dell MD3220)

We have a Dell MD3220 attached through two 6Gb/s HBA controllers. We want to enable Load Balancing to improve performance. What at the requirements and steps?
12
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2answers
827 views

Safety of write cache on SATA drives with barriers

I've been reading lately about write caching, NCQ, firmware bugs, barriers, etc regarding SATA drives, and I'm not sure what's the best setting that would make my data safe in case of a power failure. ...
1
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1answer
77 views

Extending Ubuntu LV - added new HDD

I have installed a new hard drive into my pc and followed this guide to extend the logical volume but I have barely gained any space? ...
0
votes
1answer
284 views

Fujitsu Eternus dx80 storage - Intake temp error

I've managed to configure Fujitsu Eternus dx80 storage (network/RAID group/volume) and from the moment I powered it I get an error message and a warning. From Event log: DB010000 DE Intake ...
0
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0answers
272 views

ESXi 5.1 local datastore no longer accessable

I'm running ESXi and just recently rebuilt a raid array, and now an existing local datastore is no longer accessable in ESXi. The details: Original Configuration: 1x usb drive (on the backplane) ...
1
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2answers
305 views

Multipath performing very poorly RHEL/HSV200

I'm running a RHEL 5.5 with multipath@HSV200 storage system. The disk performance for write is VERY poor comparing to Windows-system counterparts (which are using the same storage and multipath). ...
1
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1answer
698 views

How do you get iSCSI multipath to discover new LUNs that have not been partitioned yet?

Oracle Linux 6.3 iscsi multipath shows LUNs with existing file system but not the raw block devices that have not been partitioned yet. When I run multipath -ll it will show a LUN that has previously ...
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2answers
62 views

Access files from internet to internal server [closed]

I have an external IP pointing to it and I can mstsc (access via RDP) to it but I can't access it via \\IPADDRESS Any ideas?
2
votes
3answers
148 views

Will a raid cache be better for performance than hard drive cache speeds?

In a device that has raid 5, and a "raid cache" of 4GB, does this help performance? I have 32MB cache hard drives but I was wanting to know if the 4GB cache will make up for the difference in ...
0
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2answers
5k views

How to switch off storage IBM DS 3512?

It is a very simple question... How to switch off the storage (ex for maintance)? I really don't know if there is a standard procedure to switch off a SAS storage. I did not find any switch to push ...
10
votes
1answer
10k 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 ...
1
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2answers
2k views

Determining cause of high NFS/IO utilization without iotop

I have a server that is doing an NFSv4 export for user's home directories. There are roughly 25 users (mostly developers/analysts) and about 40 servers mounting the home directory export. ...
1
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2answers
964 views

ZFS/Btrfs/LVM2-like storage with advanced features on Linux? [closed]

I have 3 identical internal 7200 RPM SATA hard disk drives on a Linux machine. I'm looking for a storage set-up that will give me all of this: Different data sets (filesystems or subtrees) can have ...
5
votes
1answer
2k views

How to get checksum data integrity on ext4?

On file systems like btrfs you can preform a scrub, which will go though all the data to see if the data still matches the file system checksum. I would like to check the data on ext4 if it is ...
0
votes
1answer
118 views

Windows Storage Server… Just a single Administrator session?

I have a server with "Windows Storage Server 2008 R2 Standard" operating system. My problem is that I cannot access the server with Administrator account with two users at the same time... Just one ...
8
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2answers
1k views

Can different drive speeds and sizes be used in a hardware RAID configuration w/o affecting performance?

Specifically, I have a RAID 1 array configuration with two 500gb 7200rpm SATA drives mirrored as logical drive 1 (a) and two of the same mirrored as logical drive 2 (b). I'd like to add two 1tb ...
5
votes
3answers
474 views

What is the ZFS ACL limit?

Does anyone know how many user ACL's ZFS can handle? With other words: for how many users can I set ACL's like this one for the same directory? setfacl -m user:test1:rwxpDdaARWcCos:fd----:allow ...
2
votes
2answers
452 views

Are SAS Drives really worth their money and are they much better than todays latest SATA?

The price difference between SATA and SAS is really very big. Of course I understood, that SAS drives have their advantages, but does this really legitimate a price difference of 100% or more? Should ...
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1answer
761 views

Hardware requirements for servers [closed]

We have to buy a number of servers in my organisation - and after some thinking about blade vs rack, we rather want to go in direction rack - mostly due to cost considerations. Our organisation is a ...
43
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7answers
3k views

Probability of Blade Chassis Failure

In my organisation we are thinking about buying blade servers - instead of rack servers. Of course technology vendors also make them sound very nice. A concern, that I read very often in different ...
2
votes
2answers
160 views

How to use new disk space after extend attached SAN disk

I have extended the space of my SAN vDisk from 1TB to 1.2TB, but Windows Explorer doesn't show the new size. After resize the vdisk in the SAN Manager, the Disk Management utility shows the 200GB ...
1
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3answers
117 views

Setup Individual User Storage

Does anyone know where I can search for (and the terms to use) or have a link to how I would setup a personal user drive/storage for my Active Directory users? Also, how do I go about getting this ...
0
votes
1answer
69 views

Swap files in Cloud Infrastructures

At our company we set up an OpenStack Cloud and are currently creating internal guidelines for creation of OS templates / images. One controversial topic was if we should provide swap inside the VM ...