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

DELL FS12-SC PERC 6/i replacement with JBOD support? [closed]

I have 3 DELL FS12-SC servers with a bunch of 3TB drives (issue number 1, the perc 6/i doesn't appear to support 3TB drives). I'm setting up a ceph cluster and need to run the drives in JBOD mode. The ...
0
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1answer
66 views

How do I change the hostname in a fhgfs management node?

FHGFS is a high performance parallel file system typically used in clusters. How would you go about changing the hostname of the management server without breaking connection between the storage and ...
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1answer
110 views

datatstax opscenter v 4.1.2 short-os collection failed

I've installed Datastax opscenter v4.1.2. It was bundled with Datastax Cassandra Community edition version 2.0.8. I'm running these on Windows Server 2008 R2 64-bit. When I open opscenter all ...
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2answers
248 views

What is the maximum theoretical throughput of a NAS device to 100 workstations with 1Gb/sec connections? [closed]

This is a difficult question to ask, since it depends on a number of assumptions. But let's assume we have 100 workstations that need to connect to a network attached storage device. What is the ...
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1answer
964 views

Error 26101: SSL certificate common name invalid

I have 3 systems with similar configuration: Windows Server Datacenter 2008R2 MS System Center 2012 connected to a storage array On 2 systems I can add the storage provider from VMM without any ...
0
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1answer
816 views

Dell PowerEdge R710 direct-attached to HP MSA 2040 SAN [closed]

I have no idea about Direct attached storage; I do not know that it is possible to do. I plan to use HP MSA 2040 storage to direct attached with my dell Power Edge R710 via Fiber Channel. What do i ...
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0answers
96 views

HP Command View: Could not find authenticator for Security Domain

I have some HP EVA storage arrays. They are monitored via Command View - the HP management product. Of 8 management servers, a grand total of one will not let me log in using 'domain' credentials - ...
3
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1answer
389 views

After resizing a share's quota, why would we need to “resize” the volume?

We have one volume in our NetApp filer with multiple Qtrees that are shared as CIFS. To resize a share we normally: Modify the quota on the share Use "resize" command on the volume Perhaps I'm ...
0
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1answer
1k views

devstack - how to add directly attached storage to a single node installation

I have devstack up and running on an Ubuntu 14.04 x86_64 VM in a single node environment. The VM has / mounted on an 8GB primary disk and an 80GB secondary disk mounted on /mnt. Output of mount ...
2
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1answer
2k views

How to configure multiple iSCSI Portal Groups on a EqualLogic PS6100?

I am working on a migration from a VMware vSphere environment to a Hyper-V Cluster utilizing Windows Server 2012 R2. The setup is pretty small, an EqualLogic PS6100e and two Dell PowerConnect 5424 ...
0
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1answer
737 views

JBOD with PERC H810

I'm wondering if anybody has ever used Dell storage products like the MD3220 array in a JBOD configuration. From what I can tell only perc h810 will work for external JBOD but that is not terribly ...
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2answers
1k views

Resizing of volumes used as VMWare NFS datastores causes Linux VM issues

We had to perform a live volume resize of an NFS datastores VMWare uses on our Netapp. All of our Windows VMs were fine after the resize. However, some of our Linux VMs had issues. Some Linux VMs ...
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2answers
142 views

Store VMs on the same Stick as ESXi

I've a HP N54L Microserver with an ESXi, which runs from the 16GB USB Stick. In vSphere client I can't see any volumes, where I can store my VMs. And I think that ESXi never needs 16 GB to work. Is ...
5
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2answers
4k views

Why would Linux VM in vSphere ESXi 5.5 show dramatically increased disk i/o latency?

I'm stumped and I hope someone else will recognize the symptoms of this problem. Hardware: new Dell T110 II, dual-core Pentium G850 2.9 GHz, onboard SATA controller, one new 500 GB 7200 RPM cabled ...
1
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1answer
168 views

Selecting an EBS Volume as Root for EC2 instance

When launching an EC2 instance you have the option to select storage for your system but it seems to automatically choose a root volume for you. Is there a way to choose a root volume from among your ...
0
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1answer
61 views

Does a HP MDS600 fit in a HP 10636 G2 rack?

In the Quick Installation Giide to the MDS600/D6000 storage server it says IMPORTANT: Some racks other than the HP Rack 10000 Series rack do not allow full access to hard drive bays 29-35 in ...
0
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1answer
145 views

How to set two RAID1 on the HP SA-E200i controller?

I have an HP ML350 G5 with a RAID 1 between two SAS disks. I want to add 2 extra disks and configure a new RAID 1 separated from the other one. Reading this topic Multiple RAID arrays on E200i it ...
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1answer
195 views

Shared storage solution for Debian Wheezy [closed]

I need to setup a new infrastructure which provides high available shared storage between debian servers. Our current solution is a "clustered DRBD NFS solution". We have setup 2 virtual file ...
6
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1answer
846 views

DFSR Backlog Stuck on Non-Existent Folders

I have two 2008r2 servers setup in a full-mesh multipurpose replication group. (01 and 02). 01 was the source server. The initial sync just finished last night and there are 2 folders that do not ...
1
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1answer
349 views

VMDK File Growing After copying it using CP?

Using FreeBSD and a mounted NetApp NFS Share. I'm trying to copy a file FROM: localdisk/something.vmdk (size 527776 kilobytes) TO: nfsmount/copy-something.vmdk (size 533168 kilobytes) But it seems ...
6
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1answer
497 views

DFSr detected that a file was changed on multiple servers, but “winning” file and that moved to conflicts folder have same hash

We've just deployed a new DFS replication system between two Windows 2012 R2 servers. We cloned the DFSr database using MS's recommendations ...
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1answer
190 views

Which will have more faster for backups between usb drive on vm or NAS drive

I have IBM server with SAS drives and ESXi Server with many VM (not production). Now for backups of VM i have two options But NAS drive and use that on network Get USB drive , attach to FreeNAS VM ...
2
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1answer
62 views

MSA2312i shows duplicate enclosures?

I just installed a redundant controller in my MSA70. This is in use with our old MSA2312i SAN. Now I'm seeing two entries for 'Enclosure 3' (the associated MSA70 disk shelf) in the UI. It appears ...
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1answer
276 views

Video hosting: Host files on web server, storage server, NAS? [duplicate]

I inherited responsibility for the back-end of a growing distance education program. They have a Proliant DL160 Gen8 web server which serves video from a ReadyNAS Pro 6. We currently share the ...
0
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1answer
357 views

ReadyNAS 3200 Taking a Long Time to boot

I have a ReadyNAS 3200 that locked up on me. I could web into it, I could see the files on it via CIFS, but it would not allow me to access existing, or edit/create new files. I would get an error ...
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1answer
220 views

Hyper V with a DELL MD3000 Poor I/O

Current build is 2 Dell R900 24core each 128GB ram - 8x 144GB 15k 2.5 SAS on a Perc 6i local - 15x 300GB 15K 3.5 SAS in a Raid5 DG 6 VG in the MD3000 using 2x Perc 5e HBA - OS Windows 2012 R2 ...
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1answer
53 views

Getting ssd, should i keep the ssd cache drive

We are going to install sdd's as main hdd in all of our pc's. However, some of them already have an ssd drive that is beeing used as a cache drive. Should be keep this chace ssd? It was my though ...
3
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1answer
198 views

How can I measure complex I/O activity to develop realistic benchmarking? [closed]

I need to retrieve a few metric from my service server to benchmark another stroage solution. There are various options are provied by benchmark program(I choosed ...
18
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2answers
1k views

How can I safely use storage thin provisioning?

I have storage that allows me to thin provision my volumes presented to the clients. Is this safe? What are the best practices?
8
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2answers
5k views

VMware ESXi SSD on RAID showing as non-ssd

I am replacing a KVM server with a ESXi server. I just installed ESXi 5.5u1 and added a data store. The new server has 4 SSD drives in RAID 6 using hardware RAID. When I added the data store VMware ...
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3answers
729 views

Identifying failed hard drive in RAID

I have a server which is running customized version of Debian. It is attached a sun storage raid. It has very limited tools and installing new tools is not allowed. :( This message I see in dmesg: ...
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0answers
294 views

Most efficient way to setup massive high-availability storage in Azure to work with multiple VMs?

I'm looking into various options for setting up massive high-availability storage in Windows Azure, to use together with my Azure VMs. The VMs need to be able to work with the storage as if were a ...
4
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1answer
529 views

Mail Server Storage Backend: Filesystem VS Database

I am trying to compare mail server software to decide which to use at the ISP where I work. I'm confused mainly about which storage backend is better for such use (again, at an ISP, i.e expected large ...
0
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1answer
88 views

Use 'normal' disks in a Dell Powervault? [closed]

I want to build a two node rack, with one node being high compute intensity and one node used to store the results. I am not concerned with data integrity. When I look at the cost for 'nearline' ...
2
votes
1answer
321 views

Beowulf cluster storage setup [closed]

I'm a Computer Engineering student working on a project with a Verari blade cluster, a bit outdated for today standards. I had acquired some Unix experience but I'm not an expert at all. This Verari ...
0
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2answers
44 views

What limits a Device not to detect multiple LUNs behind a single target?

What limits a Device not to detect multiple LUNs behind a single target? What is required to make this possible in broad perspective? I want to know if there are any limitations in SAS/SATA or SCSI? ...
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2answers
4k views

NetApp filer - resetting NTFS permissions with fsecurity?

I have a NetApp filer, with a CIFS export. The permissions have been locked down on it, to a point where it's no longer accessible. I need to reset the permissions on this - I've figured out I can ...
5
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2answers
24k views

How to monitor the hard disk status behind Dell PERC H710 Raid Controller with CentOS 6?

I have a Dell server running CentOS 6 using PERC H710 Raid Controller card with Raid 5 setup and I want to monitor the hard disk failure/working status behind the Raid Controller. Then I should be ...
4
votes
1answer
425 views

Can someone explain the important differences between fabric, point to point, and loop on a fibre san?

I have a fully redundant HP 8/20q FC SAN that has been working well, but as I dig deeper into things looking for more performance, I'm quickly at the end of my knowledge when it comes to FC ...
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1answer
137 views

less IOPS number but better READ/ WRite performance [closed]

I tried measuring virtual disk performance using bonnie++. Case 1 result : Using uid:0, gid:0. Writing intelligently...done Rewriting...done Reading intelligently...done start ...
5
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2answers
360 views

iozone: 5 concurrent threads random read of 300K blocks does more ops/s than using only one thread, what could be the underlying reason?

The partition is in RAID1 using software RAID. Command line used: iozone -s 190g -r 300k -O -b test_file OPS Mode. Output is in operations per second. ...
11
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3answers
6k views

Can NetApp Snapshots be used as Backups?

Our shop relies very heavily on NetApp Volume Snapshots for backups. We use traditional agent-based tape backups for some of our data but by and large we rely on the Snapshots for the majority of our ...
0
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3answers
220 views

Linux: Get information/stats about storage network

I want to know as much info as possible about the SAN a linux server is connected to. What commands will give me the most comprehensive view? Simply knowing the WWN of LUNS doesn't do much for me. ...
0
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1answer
204 views

dd output file larger than input file when executed with conv=noerror,sync

I am trying to backup an LVM on one of my servers with the following command: dd bs=4M conv=noerror,sync if=/dev/vg_volgroup/LvmName | ssh myuer@myip "dd of=/home/myuser/LvmName bs=4M ...
3
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1answer
1k views

How often should I scrub my RAID?

In general I would like to know how often a RAID array needs to be scrubbed. What contributes to the need to scrub more often (reading data?, writing data?, unexpected shutdowns?, drive age?, drive ...
2
votes
1answer
523 views

iSCSI MPIO disconnections

We have a test cluster setup with MPIO and all seems to be working well. The setup is using Windows Server 2012 r2 with a qnap as the backend storage. Routes are as follows; 172.16.10.10 (qnap port ...
0
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1answer
66 views

What are challenges with Linux Storage Servers having 7 or 15 drives? [duplicate]

I'm evaluating options for image webservers for Tralev (in the case it grows). I was looking into Hetzner's storage line. They offer storage servers with 7 and 15 drives. 7 drives with software ...
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3answers
59 views

Change disk used by a long running process

Let's suppose I have process that does long calculations (e.g. it's been running for days), it uses a disk as temporary storage to store intermediate results (for example mounted at /mnt and I want to ...
1
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1answer
240 views

9211-8i HBA (IT mode) with Supermicro expander

I have managed to get things to a point that I see all my drives listed with "multipath -l". Now the question is how to add them to a ZFS zpool? All attempts at using dm* naming or /dev/mapper names ...
0
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2answers
136 views

linux minimal block size [closed]

Question : I would like to know if one could create an empty partition with a very small block size, say 100 bytes, and get their experience on the long run. Are there any gotchas ? Context : I ...