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

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1answer
374 views

HP EVA4400 Vraid5 Virtual Disks Failure

I have a eva4400 with 8 disks six of them in a raid6 group I have 2 vraid5 in this group. I have lost 3 disks. Since I get the administrator post after the disaster happened I have no clue on how ...
0
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1answer
79 views

Consequences of exposing VM storage on same subnet as VM's and hypervisor

I recently purchased a RAID array to store my VM's and segregate the storage from the host machine. Since my needs are pretty simple I've configured the VM's to bridge with the host network (I think ...
2
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2answers
79 views

vSphere Virtual Storage Appliance: adding physical storage

Right now, we have two physical ESXi (5.1) servers, each with a RAID 10 array of physical disks; currently, we're using one of these as the primary datastore for the virtual machines that reside on ...
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2answers
47 views

Difference between image and snaphot?

Can any one explain what are the differences between image and snapshot in terms of storage.
3
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2answers
206 views

What is a proper procedure for unplugging fiber chanel from ESXi

In my DC admins have to unplug my FC connection from ESXi5 (from EMC VNX) (temporary, some maintance works). I have never done that before and have some doubt about my own procedure... My first ...
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2answers
215 views

RAID 10, 3 drives or 2 drives?

Drives are very cheap these days. Would it be worth it to increase the group size from 2 to 3. I found 1TB drives for $60. I feel as if the array is very vulnerable to failure in a 2 group setup ...
10
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1answer
4k views

Is calculating IOPS for ZFS RAIDZ different then calculating IOPS for RAID5 & RAID6?

When calculating IOPS for traditional RAID arrays, one could use the following formula (Borrowed from Getting The Hang Of IOPS v1.3 on Symantec Connect): Ieffective = (n * Isingle) / (READ% + (F * ...
7
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1answer
778 views

VMWare ESX and guest settings for Netapp cluster failover

If I'm running VMWare 5.x on FC [edit] LUNs presented from a Netapp running ontap 8.x in 7 mode, what steps should I take to ensure that the VMs can withstand a worst possible case cluster node ...
3
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1answer
2k views

How should I calculate IOPS for RAID50 & RAID60?

I'm investigating some 4TB database systems and I'm comparing differences between RAID-10 & RAID-50. I know how to calculate the IOPS for common RAID levels like RAID-1, RAID-5 & RAID-10. ...
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2answers
887 views

Safe recovery of a working RAID Array after OS drive failed

I'm working with a server that recently had two drives fail. Windows Server 2003 - Standard Array 0 (bootable) - two 35GB U320 drives in a striped set. Array 1 - two 35GB U320 drives in a striped ...
10
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3answers
1k views

HP storage arrays - multiple channels?

Our SQL server is becoming pretty heavily loaded, and all indications point to the disk channel being the bottleneck. The current HP server has a fairly low-end array card, and we're looking to ...
0
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1answer
252 views

Software RAID for a petabyte storage array [closed]

I'm trying to build my first personal storage area network (flexible downtime, speed is not a priority) to hit 1 petabyte on a budget, and am considering a modification of the Backblaze pod as the ...
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4answers
86 views

Muliplte logical drives on a single EVA

SQL Server best practice recommends separate drives for the the data and log files. Do you really get a speed increase if both logical drives are located on the same EVA?
1
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1answer
368 views

Is there a programmatic way to determine free disk space on a Linux server?

I have a collection of Linux servers, each of which has a local hard drive with a /tmp directory. Occasionally, the /tmp directory on a server will fill up and cause errors. I want to automate the ...
1
vote
1answer
185 views

Is it possible to speed up network filesystem by sth like unionfs, aufs?

I need to speed up slow, large storage with local SSD drive. I figured out I could do this with union filesystems. Here are results with nginx reading data from: local SSD alone: ~140 ...
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votes
1answer
114 views

Recommended disk array for backup use with SCDPM? [closed]

I am trying to create a new disk array that will have two purposes: Archiving data long-term nightly backups This is replacing 10 TB configured across several consumer grade USB disks, Backup ...
0
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2answers
2k views

No primordial storage pool in windows 2012

I recently installed Windows 2012 R2 Preview and are in need to construct a storage pool for usage with Thiered storage. And as the topic says there is no primordial storage pool in my system, this ...
1
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1answer
112 views

How to avoid deliberate corruption using a NAS for backup

This is an extension of my question here (Small office backups, small NAS (RAID) vs single disk). What would be a good way to structure a NAS backup solution to prevent deliberate corruption by a ...
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2answers
1k views

What is the best way for store images of website? [closed]

We are using cassandra database for store website information, but we are not sure how to save images. We can store them in cassandra, but we can also allocate a server for storing images. ...
0
votes
2answers
447 views

Multiple 2 TB LUNs — ZFS or ext4-over-LVM

I am going to deploy an Ubuntu 12.04-based archiving system. Due to limitations of the SAN Storage, it can only present me with 2TB LUNs. So, I have to merge multiple 2TB LUNs to achieve the desired ...
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 ...
1
vote
2answers
637 views

Intel RAID Web Console 2 and ESXi 5

I have two ESXi servers with Intel SRCSASBB8I RAID controller. When those server have installed ESXi 4.1 I was able to manage RAID configuration of those server using Intel RAID Web Console 2 running ...
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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
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2answers
146 views

Why it is dangerous to turn off storage arrays even in extreme cases?

I have read in a couple of places that when you are in the situation in which there are no spare disks and the RAID level doesn't protect you from another disk failure, some administrators choose to ...
0
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2answers
112 views

Is there redundancy during a RAID build?

We're building an array of 12x 2TB drives in a RAID60 array using an Adaptec hardware card. It's taking a long time to build/verify, and performance is slow. We've worked out that it will be around ...
2
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5answers
166 views

Provide iSCSI storage for Virtual Environments through host or directly to guests?

We are planning to place a HP MSA P2000 with two FC/iSCSI controllers in our network. We have two options to provide more storage to Virtual Machines (We are running Hyper-V): A) Add iSCSI targets ...
2
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3answers
7k views

Software RAID underneath ESXi datastore

I'm building an virtual environment for a small business. It is based around a single ESXi 5.1 host, which will host half a dozen or so VMs. I'm having some doubts regarding how to implement the ...
0
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1answer
104 views

Which hardware I need for building up a backup server, which is able to store 100TB+? [closed]

we are managing a pool of 40 PCs with an attached storage of up to 3 TB each. Every weekend we copy this data to 3 other PCs with several RAID5-systems inside to have some kind of backup. We chose 3 ...
1
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1answer
609 views

Does a 3ware “ECC-ERROR” matter on a JBOD when I have ZFS?

I have a FreeBSD 8.x machine running ZFS and with a 3ware 9690SA controller. The 3ware controller shows an ECC-ERROR with one of the disks: //host> /c0 show VPort Status Unit Size ...
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2answers
1k views

ESXi local storage recommendation

We are going to buy HP Proliant Server Dl 380p G8, and we want to run vmware esxi 5.1. but I have problem with choosing the correct storage with the lack of budget. we have choice to buy 4x2TB SATA or ...
6
votes
2answers
3k views

Can I determine IOPS on a disk array using bonnie++?

I would like to measure the read and write performance of a RAID6 array verses a RAID10 array. I understand that bonnie++ can be used to calculate disk performance, but the numbers produced by ...
8
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2answers
217 views

A roundrobin for incoming files

A bunch of new files with unique filenames regularly "appears"1 on one server. (Like hundreds GBs of new data daily, solution should be scalable to terabytes. Each file is several megabytes large, up ...
1
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1answer
63 views

Safest approach when designing storage server [duplicate]

We are planing cloud solution for our customers and we are really concerned with designing safest storage servers for their files. This storage won't be IO demanding, as it will contain only files ...
1
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3answers
245 views

Storage for KVM virtualization

I am looking into setting up 3 kvm hosts. Currently I am using local storage with mirrored drives raid 1 for images. I am also using raw images. I was wondering if this is against best practices and I ...
1
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1answer
217 views

HP MSA1500 - getting past the 2TB limit?

I currently have (7) 300GB drives in the MSA1500. This is configured with RAID 5 which results in a 1.8TB drive, about 1.6TB formatted. I still have 7 more empty slots in the enclosure that I would ...
1
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2answers
263 views

Advice for inserting additional disks to a ZFS mirrored pool?

I am running FreeBSD 9.1 with root on a ZFS mirrored pool. At first the pool (labelled zroot) has a total of 1TB spanning two 1TB drives. Recently we have run into disk space issues in which the ...
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votes
3answers
706 views

Managing storage for Virtual Machines in Red Hat Enterprise Virtualization (RHEV)

I am using RHEV and I have created two virtual machines. These have too little disk space, how can I edit the disk space of these machines? I cannot find the option anywhere.
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2answers
547 views

P812 “forgot” RAID6 - can't see disks at boot time in ORCA

We have an MSA60 with 12x4TB non-HP issue Seagate Constellation ES.3 drives connected to a P812/FBWC, on which I created a RAID6 over all of those disks with hpacucli and started to copy data on them. ...
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votes
1answer
64 views

How much should it cost to implement shadowing for a Windows Server 2008 environment? [closed]

I should perhaps preface this by saying that I am not a sysadmin but rather a user. The reason I'm asking this question is because I and other users at my company have experienced accidental deletion ...
1
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2answers
45 views

Use a virtal disk over shared storage, or expose shared storage inside guest [closed]

At work, we have a system that relies on what I can equate to a flat file database. It does what appears to be liner scans of each database file. Naturally, our limit here is going to be file I/O. ...
0
votes
1answer
60 views

How to ensure all public mirrors contain same content?

Basically I plan to have some files mirrored on multiple servers on different providers. A unique cname will auto-balance the traffic across all available mirrors and will serve from the closest to ...
17
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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 ...
0
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1answer
344 views

How to perform Amanda Incremental Backup

I had configured and backup some of windows clients I have a few questions: How can I check the incremental backup is performed or a full backup, I use (amdump server1) to backup all client systems, ...
0
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1answer
83 views

MPIO alike multipathing tool for Windows Server [closed]

We are looking for free multipath tool available for Windows Servers alike MPIO. Vendor specific multipath tool like Powerpath for EMC are license based and would like to evaluate different open ...
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votes
1answer
36 views

Good way to get HDD in a large logical disk. *7 Discs of different sizes [closed]

Basically I would like to have one large logical disk. Data security is important, but not critially. Typically I would like something like 1st prize: Raid 5 2nd prize: Loosing all data on failed ...
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0answers
67 views

Is it possible to dynamically set the upload_store value for nginx upload modue?

I have a lot of hard drives in my server and I want to upload files to them. Since it is overhead to upload a file to one drive and then move it to another, I would like to directly upload the file to ...
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1answer
594 views

ESXi 5.0 - Software RAID 1

Environment: Storage: HP P2000 MSA G3 SAS Array with 24 300GB 10k SAS Disks Two Storage Controllers with redundant SAS connections to each host Hosts: Three HP DL380 G7s with a 10GB SD Card, ...
2
votes
1answer
89 views

Ultra 320 SCSI termination

I want to connect an old 12-bay DataStor InfoStation (which is an external storage cabinet) to an LSI MegaRAID SCSI 320-2E host bus adapter and now wonder what bus termination guidelines to follow. ...
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1answer
907 views

Dell Compellent SAN with ESXi 5.1 iSCSI

I have a Compellent SAN that I am trying to point to my ESXi server through iSCSI. In the Compellent UI: i've created a volume. It, of course, says the volume is offline until you map it to a server. ...
5
votes
2answers
322 views

Networking with VMware, physical adapters and iSCSI

New VMware user here, setting up my first environment. I have an ESXi host that has four physical NiCs (NiC0, NiC1, NiC2, NiC3). I have installed ESXi, the VCVA appliance, and several VMs ...