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

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0answers
560 views

Access iomega StorCenter ix4-200d dump utility from SSH

My employer is in the process of returning a broken HDD to Lenovo/iomega. Unfortunately, before we can send it in, they require us to do a complete dump of the system's current state. Normally, I ...
1
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2answers
176 views

Is there a way to fake “slow” storage for testing?

I need to test my system with varying degrees of storage latency. Is there a software solution (for Windows) that would allow me to "fake slow" storage for testing purposes? I'm basically looking ...
0
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2answers
2k views

XenServer Shared Local Stage

I am new user of XenServer 6.2. I have multiple servers connected to Pool/Cluster. Each server has 4 HDD with sw raid10. I would like to make local storage shared because of need quick migration. ...
2
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2answers
2k 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 ...
2
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1answer
47 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 ...
0
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1answer
3k views

PowerVault MD3000 Password Reset Console Password

I need to reset the password on a Dell PowerVault MD3000. I have the necessary password reset cable and am able to get to the point where I am prompted for the "password from Dell Technical Support" ...
0
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1answer
287 views

LUN storage disk in 2 servers, can't see the files

I have one LUN disk connected over FC with linux server ( with centos) and esxi server with VM in Centos. (Two machines work in different LAN's.) In both machines i see this disk. In VM i created the ...
0
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1answer
58 views

Improving Hard Drive controllers and Software RAID [closed]

I believe the biggest pro of hardware RAID is that, providing your RAID controller is battery backed, you can enable write-back cache. This can also be achieved similarly through software RAID with ...
-2
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1answer
54 views

What tool/application (free or not) should I use to generate and write lots (TBs) of data, fast [closed]

I am testing a storage appliance and need to write TeraBytes of data to it. Using fio or dd takes days to write that much amount of data. Are there any (free or not-free) tools/applications, that I ...
4
votes
3answers
299 views

Store multiple versions of large binary file with minimal data duplication (preferably Linux)

I need to store multiple versions of a ~ 150 GB binary file (qcow2) on Linux servers with local storage, and was hoping there is some solution that involves just keeping diffs that can be merged as ...
0
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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 ...
0
votes
1answer
108 views

Understanding swiftstack storage

I just wanted to make sure I understand swift FS properly. Is it possible to run a live VM operating system image on Swift like you can on a mounted SAN/NAS/Local storage? Or is it just for operations ...
1
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2answers
60 views

Storage for HP server (sbs2011)

I currently have HP ML350 G6 with 2x300 GB raid disks. Server main purpose is: - Exchange server - Office network (25 users) - File storage Now one problem is that one department has a need of ...
1
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0answers
80 views

3ware 9500S-4LP raid-1 rebuild failed

After replacment of 2 failed drives on 3ware card i got this: Ctl Model (V)Ports Drives Units NotOpt RRate VRate BBU ...
3
votes
3answers
136 views

How to connect SATA disks to copy large amounts of data from them to HP server running CentOS 6

We have an HP Proliant DL320e running CentOS 6. We will get SATA hard disks with data in the formats NTFS, FAT, HFS and HFS+ from which we would like to copy the files to the server (read-only), ...
3
votes
1answer
134 views

Poor NFS Performance Using Multiple Disks

I have a server system running Ubuntu 12.10 with 12 disks attached. I am sharing all of these disks on my 10 gigabit network using NFSv4. However, I am getting generally poor performance over NFS ...
1
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0answers
106 views

Partition block size different from device's and stacked LVM volumes ones

I have a pair of HP ML350 G6 servers with LSI MegaRAID 9266-4i+CacheVault driving Supermicro CSE836E16 enclosures via SAS bracket, filled with WD RE 3TB SATA drives. On these are configured a RAID10 ...
0
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0answers
60 views

Unable to login into CISCO SAN switch management IP

when i try logging into the switch through device manager it throws the below error: "busy network,no rout,snmpd unresponsive" The physical connections between the san switch and the network switch ...
0
votes
1answer
502 views

WD Sentinel DX 4000 Remote Web Access requires port blocked by ISP. Is it possible to change the default ports?

WD Sentinel DX 4000 Remote Web Access requires port blocked by ISP. Is it possible to change the default ports? The ports required are 80 for HTTP, and 443 for HTTPS. I can RDP into the server ...
0
votes
3answers
449 views

qemu don't start quest with disk image on tmpfs

I have 32bit windows 2k3r3 guest (terminal server) with 4GB guest ram and swapping. I created separate disk image for guest swapping and user's temp dirs. I have enouth RAM in host system and want ...
2
votes
1answer
96 views

Creating “Odd” Size Disks in VmWare/Linux

I believe I suffer from "everything must be in powers of 2" syndrome. When asked to create a 30G disk in VmWare for a VM I want to create a 32G disk. If someone needs 256G of storage using LVM I ...
0
votes
2answers
518 views

Setting up a storage server to replace Dropbox [closed]

We are a non-profit organisation in education sector dealing with a lot of external stakeholders including the government. As such, we work with a lot of documents every day including: Office ...
2
votes
1answer
237 views

Best practices on VM disk management

I'm replacing two old rack servers with a new one that has plenty of power to take over the functionality the current servers. The server is a 4U rack mount with 16 3.5" SAS drive bays, two 2.5" bays, ...
1
vote
1answer
407 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
votes
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
votes
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
209 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 ...
-3
votes
2answers
236 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
votes
1answer
5k 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
votes
1answer
828 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
votes
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. ...
0
votes
2answers
946 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
votes
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
votes
1answer
255 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 ...
1
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4answers
89 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
377 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
199 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 ...
-1
votes
1answer
124 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
votes
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
vote
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 ...
-1
votes
2answers
2k 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
470 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
683 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 ...
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 ...
1
vote
1answer
509 views

RAID controller won't rebuild RAID-1 array

I have a RAID-1 array on a desktop computer. The RAID controller is a 3ware 7006-2. Recently the controller has been reporting ECC errors from one of the drives. It was able to correct all of those ...
2
votes
2answers
150 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
votes
2answers
114 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
votes
5answers
168 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 ...