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

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4answers
76 views

Need to make a storage that keeps growing in size [closed]

First, due to security reasons and others I wont be able to make use of S3, or other similar solution. I have a a storage server in which I have a 1TB had disk. I have a Mysql server running in it. ...
0
votes
0answers
65 views

Storage of large number of files for a web application

There's an old discussion whether and application should store its files in a database or in the filesystem. Both have their pros and cons. I want to know if there's any specific system for ...
1
vote
1answer
304 views

ESXi: Storage Adapter Paths - Active/Standby to Active/Active

We have a couple of servers acting as VM hosts (ESXi v5.1) and they are connected to a Dell MD3220 SAS Array (2 cables each, split across 2 controllers). We've just noticed that multipath wasn't ...
3
votes
2answers
49 views

hba for software raid

In a software raid environment, is HBA failure the same as a hardware RAID controller failure? Do you still have to find the same model HBA to put into a different server in order for the drives to ...
0
votes
1answer
69 views

Unmount volume or halt Linux on disk IO error

Is there a way to dismount a volume (with open files on it) or cause kernel panic if IO error occurs on underlying disk? OS is Linux. This is needed to prevent data corruption in case of storage ...
0
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3answers
348 views

What are the benefits of having local disks on hypervisor nodes running VMs off a SAN?

When an hypervisor like XenServer or vSphere can be run on diskless nodes (eg. by booting from flash cards or from the network) and VM storage is handled via a SAN, is there any good use for local ...
0
votes
1answer
45 views

Grid storage for large files on multiple external machines

I have several dedicated servers with unused space on them. 16GB+ RAM, some have SSD, other HDD. All have minimum 100Mbps connection. OS is Debian 7 64bit. There is no LAN connection between machines ...
0
votes
0answers
52 views

windows storage server 2012 web administration

I needed to build a raid server in house for development. Being in MSDN we chose windows storage server 2012. We set up a storage pool and exercised fails and then re-built the server. I bumped into ...
48
votes
8answers
2k views

What are the advantages of tape drives?

IBM still develop and sell tape drives today. The capacity of them seems to be on a par with today's hard drives, but the search time and transfer rate are both significantly lower than that of hard ...
1
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1answer
82 views

Sharing information between nodes in Beowulf Cluster

I am setting up a beowulf cluster and I've been reading that it might be necessary to make the home directory of the cluster users shared between them (assuming this users are local to each machine). ...
2
votes
1answer
457 views

MacBooks are destroying SSDs

I'm opening this topic to find the cause of our SSD failure rate of +50%. We work with Mac (13" Macbook Pro & 13" Macbook Air), with installations of both Mac OSX Mountain Lion and Ubuntu. 90% of ...
1
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4answers
2k views

Creating bootable Fedora USB with persistent storage

I am attempting to burn the full Fedora 19 x86_64 DVD iso to a USB drive and have a separate partition on it for a kickstart file / other media that will be installed in the kickstart process. With ...
1
vote
2answers
72 views

RAIDs with a lot of spindles - how to safely put to use the “wasted” space

I have a fairly large number of RAID arrays (server controllers as well as midrange SAN storage) that all suffer from the same problem: barely enough spindles to keep the peak I/O performance, and ...
0
votes
2answers
286 views

Cannot join CIFS server to a active directory domain

We have a VNX5700 in our environment , it had two datamovers(one as primary and the other secondary). Recently we added a third datamover to the array and configured it as an active DM , so we will ...
0
votes
1answer
207 views

Solaris iSCSI read speeds increase when we start writing

Here's one I haven't seen before. We have an IBM Storwize V3700 storage array, 24 TB, RAID 5 connected to a Solaris 10 file server via an iSCSI link over Gigabit Ethernet (no MPIO at present). We ...
1
vote
2answers
264 views

SAN newbie: What kind of fiber cables do I need to connect to the front end ports on my EMC CX300

I have an old CX300 I'm messing with and I cant determine what kind of HBA\fiber cables I need to connect a server to the front end ports on the DPE2. The hardware reference doesn't give me any ...
2
votes
4answers
105 views

SAN newbie: Using a server like an ISCSI gateway for a purely FC SAN device

I am very new to SANs and have inherited an old EMC CX300 to play with. The CX300 is purely FC, but I'd like to experiment with ISCSI as well without having to purchase an expensive ISCSI gateway ...
1
vote
0answers
403 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
vote
2answers
166 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
votes
2answers
1k 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
votes
1answer
1k 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 ...
0
votes
1answer
1k 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
votes
1answer
220 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
votes
1answer
53 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
votes
1answer
53 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
224 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
votes
2answers
1k 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
91 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
vote
2answers
54 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 ...
3
votes
3answers
120 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
120 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
74 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
votes
0answers
51 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
316 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
271 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
81 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
325 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
170 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
236 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 ...
53
votes
1answer
798 views

Fibre channel long distance woes

I need a fresh pair of eyes. We're using a 15km fibre optic line across which fibrechannel and 10GbE is multiplexed (passive optical CWDM). For FC we have long distance lasers suitable up to 40km ...
0
votes
1answer
70 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
74 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 ...
-1
votes
2answers
44 views

Difference between image and snaphot?

Can any one explain what are the differences between image and snapshot in terms of storage.
3
votes
2answers
180 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
171 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
3k 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
563 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
1k 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
558 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
792 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 ...