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 esxi host ha state in election

In my Vmware Esxi server 5.1 , 2 host machines which are added as cluster ,there HA state is turned to ELection .I tried Reconfiguring the vsphere for HA it is not working .In cluster it shows issue ...
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0answers
7 views

How do mirrored virtual disks get distributed in a 4 disk storage pool?

I have a Windows 2012 R2 server with 4 3TB drives. I had to upgrade after one of my JBOD disks failed and luckily I had backups to recover from my storage pool of 2-3TB and 2-1.5TB drives with 4 ...
2
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0answers
10 views

Isilon 'enabling_writes' gets stuck during failover

I've been testing failover functionality on a new Isilon. Running OneFS 8.0.0 (A .0 release, but .1 is on the install queue). Part of this is performing a failover operation, following a procedure ...
10
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2answers
21k views

How exactly does a SAS SFF-8087 breakout cable work? + RAID/connection questions

Please let me know if my question does not makes any sense as I am not sure if I am interpreting it correctly from my thoughts due to my lack of technical knowledge on this. If I am using a ...
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1answer
37 views

How cloud storage provider like google store and distinguish data of different users? [closed]

My question is simple. How the cloud storage provider like google store data of different users on same server. For example there are two user storing there data on a single drive on cloud. My ...
0
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2answers
24 views

Azure Scalable s Storage

Am wondering if for some reason I chose to deploy an Azure VM that has 29GB storage for the sda1 (O.S Disk), can I resize this disk in anyway possible? (resizing the SAME DISK without attaching new ...
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0answers
23 views

AWS Elastic Beanstalk storage on S3

I am going to build a load-balanced/auto-scaled elastic beanstalk application. I wonder if it is possible to make S3 bucket as a default storage for the application? What I want to achieve is ...
1
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1answer
2k views

interpreting IOPS these Bonnie++ and iostat results

I am looking to interpret the IOPS from a few runs of bonnie++ using iostat simultaneously and using the benchmarking from this post: Can I determine IOPS on a disk array using bonnie++? bonnie++ ...
1
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1answer
10 views

HP SAS Expander 12Gb max storage limitations

Is the max storage limitation stated in HP's documentation a real limitation or not? I currently have 48TB (8x 6TB in a raid 6) and I just purchased a Norco RPC-4224 and 8 additional drives to double ...
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2answers
47 views

How to eject sas hdd win server 2012 proliant dl380 g9

We got Proliant DL380 G9, when I try to eject or remove SAS HDD by taking it offline, the Red LED (Do not remove) is still on. I'm not really familiar with Proliant, on other servers I just take the ...
1
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1answer
1k views

How can I query the NetAPP ONTAP API without using the SDK?

I have a bunch of NetApp filers, which I've been accessing via ssh with public-private key pairs. I would like to extend what I'm doing - we're repeatedly hitting limitations where e.g. ssh is ...
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0answers
13 views

IBM X Storage X3650m3 for SGDEVODB02

Error showing some of the monitored parameters are abnormal in my IBM storage X3650m3 but it showing green color so i dont know whats the problem here? Can any one please help? Update: In IBM ...
2
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1answer
25 views

Change a LVM/extended to an ext4

There seemed to be some miscommunication or confusion upon the installation of solusvm for my machine. From what I understand, I will not need an LVM for OpenVZ-based installations. So far, that's ...
1
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0answers
21 views

How to emulate or make multiple iSCSI software initiator IQNs on RHEL RedHat 7?

I have 2 Ethernet HBAs with 2 ports each, all 4 ports are connected to iSCSI targets and I can login using iscsiadm command. But the iSCSI initiator name (IQN) for all 4 ports is one, in ...
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0answers
14 views

Add more Drives to a RAID controller using a seperate\another SAS expander or Controller?

I have a custom build server. It currently has an LSI MegaRAID LSI00295 (9266-8i SGL) PCI-Express 2.0 x8 Low Profile SATA / SAS RAID Controller configured with 8 3TB drive in RAID 6. Can I add more ...
0
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1answer
3k views

OpenStack Cinder: iSCSI login negotiation failure after reboot

I have a Cinder storage and controller node running on the same CentOS 7 box as Nova compute. Everything worked fine, until I rebooted. Now my instances can't mount volumes and I get the errors below. ...
1
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1answer
76 views

ESXI 6.0 u2 multipathing configuration with group by prio

Is it possible to change the path grouping policy of ESXI 6.0 multipathing to group_by_priority? In essence I want to work with the grouping priorities given by a SAN storage. I didnt see any specific ...
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0answers
17 views

Offline storage vs Cloud storage for a search engine [duplicate]

I need to store html pages from a web crawler on persistent storage. The information will be read at a rate of <1 GB/day and written at a speed of >10 GB/day since it's not a public facing search ...
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1answer
84 views

What incident may happen that stops a VM on Azure? [closed]

We were hosting a Website and a CMS at an external supplier. They told us that they host everything on Microsoft Azure. Yesterday I saw that my website was down and contacted them. Later that day they ...
0
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1answer
2k views

EMC PowerPath Support Matrix

I know this is a stupid question, but I've found nothing online. Does anyone know where EMC has hidden the support matrix documentation so that I know what version of PowerPath is supported with ...
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0answers
27 views

Confusion on how to hotswap dm-x device in software raid

Below is the dump when I do lsblk cat /proc/mdstat lmsetup -ls. So sde is dying and I would like to replace it. What i'm confused is, in lsblk it shows sde is part of md3 (software raid). but when I ...
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0answers
24 views

nas4free partitioning os drive [Nas4free]

I tried the nas4free forums but it doesn't seem that responsive so I am going to try my luck here. version: 9.2.0.1 - Shigawire (revision 972) My boot drive is in raid 1. One of the hdd is ...
3
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1answer
53 views

Four lane SFF-8088 to SFF-8470 cable, 6G/12G

I need a couple of SFF-8088 to SFF-8470 cables and the HP manual says the HP 408771-001 is the right one for me. My hardware dealer has them in stock for about 100$. I browsed a bit and found the HP ...
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0answers
33 views

Storewize V7000 GUI

Hay can you give a advice about problem GUI in V7000? what should i do if the GUI page didnt show correctly?
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0answers
19 views

MegaRAID Rebuild required after PdOffline + PdOnline?

In a RAID6 array with 12 disks I have taken a disk offline to flash new firmware, then brought it online again: MegaCli64 -PdOffline -PhysDrv[8:0] -a0 MegaCli64 -PdFwDownload -PhysDrv[8:0] -f ...
2
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1answer
625 views

Operational State Down on QLogic Switch

I have a QLogic SANbox 5800 Fibre Channel Switch with 20 SFP ports. Out of these 20, I can use only 16. The last 4 ports are showing Operational State Down. SANbox (admin) #> show port ...
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0answers
12 views

Choosing Block Size and I/O oustanding For Benchmarking Storage System

I have two quenstions. What is the recommended block size for benchmark a storage system, as I know many people would use 4K for random test but for sequential I am not sure whether to use 128K or ...
0
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1answer
35 views

VMWare and storage virtualization solution [closed]

I'd like to use the capabilities of two Dell EqualLogic SAN and a VMWare vSphere 6 installation to implement a storage virtualization solution. Basically I'd like to put virtual SAN layer above my ...
0
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0answers
32 views

Advice needed about RAID and partitioning new server

first of all i want to appolagize if i doublepost. Plese merge this with similar post. Thank you. Now about the situation and the system we are trying to build and want an advice from experienced ...
2
votes
1answer
43 views

Different IOPs measured on server and storage

so I have this strange behavior that I can not explain to myself - hopyfully someone here can. We received some server (hardware) and mounted an NFS drive. We plan to use these servers as Splunk ...
3
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3answers
850 views

Is using nested RAID 6+1+0 a good idea?

Currently I have 24 disks of 500 GB, and I would like to create a bigger nested RAUD using a Dell Power Edge R730 server, having 4 times RAID 6 with six times 500GB each, over them I want to add RAID ...
1
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1answer
33 views

How can I determine which files have high I/O in Windows?

In trying to reduce the storage bottleneck on a Windows server (2008 R2) I need to find the files that have the highest I/O over a long period of time (aka 'hot' files) so I can move those to SSD ...
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2answers
1k views

Troubleshooting MySQL Performance Issues

Environment: 1 physical machine 8GB RAM some older Core2Duo CPU 1 HDD Windows Vista 64 bit 1 Virtual Machine 16 GB RAM 2 vCPUs Windows 7 64bit Both machines running MySQL 5.5.28 (64Bit) with ...
3
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2answers
702 views

Performance associated with storing millions of files on NTFS

Does anyone have a method / formula, etc that I could use - hopefully based on both current and projected numbers of files - to project the 'right' length of the split and the number of nested ...
1
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4answers
139 views

Move existing workload to windows 2012 R2 tiered storage, sizing

I have a Hyper-V host that has it's performance bound by the storage subsystem, which is a RAID 10 array. I'd like to add two SSD PCIe cards and use them to create a mirrored fast tier using Windows ...
10
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5answers
44k 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 ...
0
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1answer
22 views

How to calculate storage working set for sizing SSD/Flash size for tiered storage?

How would you calculate the size of the working set of storage that would live in a SSD/Flash tier of a tiered/hybrid storage solution? This would be used to gauge the size of the SSD/Flash tier. By ...
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2answers
1k views

RAID1 very slow with LSI card and 2x Samsung EVO 850 drives

not sure if I'm checking it correctly, but here is what I have. Desktop, LSI 9260-8i card, see config below. 2x 500Gb Samsung 850 EVO drives. I also have Samsung 830 drive attached to motherboard ...
1
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1answer
46 views

Slow shared NAS storage for VM cluster

I have a problem with a very slow virtual machines. I have two HP DL380 G6 servers in the cluster that are connected to the Synology NAS 2416+. Everything is connected via the HP 1620 Switch. On the ...
0
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1answer
69 views

Server 2012 R2 — Using Storage spaces with hardware RAID?

I'm studying for MCSA using Server 2012 R2. I'm running a Dell r610 rack server with a perc6/i controller for hardware raid. Hardware raid is set up with a virtual array in a RAID 10 configuration. ...
1
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1answer
54 views

What are storage consistency groups?

Can anyone explain to me what 'consistency groups' are in the context of storage solutions? How can I use them in the real world? It seems every vendor has its own proprietary terminology for storage ...
9
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2answers
366 views

Can you connect a SAN directly to a HBA with Fibre Channel?

I am in the process of sourcing our company's first SAN as we have the need for high availability/shared storage. I have noticed fibre channel switches are extremely expensive, and for redundancy we ...
0
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1answer
46 views

HyperV-2012R2 Storage Migration cannot migrate entire VM in FCM

I am new to HyperV and currently moving our setup from esix4.1 to 2012R2 HyperV. We were testing out the storage migration and it is pretty cool but I could not figure this out: - If the VM is not in ...
0
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1answer
20 views

Purpose of '.status' VHDs that are created when booting an Azure VM

I'm using the Portal (portal.azure.com) and choosing the Resource Manager view when booting an Ubuntu VM on Azure. I'm seeing that there are two vhds that are created as part of booting the Instance. ...
2
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1answer
38 views

Foreign cards in a HP server, do they cause the server to operate outside of specs?

I have a Proliant DL380 G7 I am going to be staging as lab server. As part of the server I plan to run ZFS as the base filesystem and installed 2 LSI 9211-8i cards for the disk controllers since the ...
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1answer
22 views

Does ESXI Require New Drives Be Part of a Datastore to be seen by Virtual Hosts?

I posted a similar question to SuperUser and got not response, so I apologize if I've broken rules by posting here, but I'm at a crossroads on my server setup and need a bit of help. I am new to EXSI ...
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1answer
30 views

Move Unallocated Space Between Disks

I am running Ubuntu's latest LTS. In /dev/sda I have sda1 and sda2, both are using a couple hundreds of MiB with a couple of GiB allocated. So far so good. In /dev/sdb I have just one partition, sdb1 ...
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1answer
26 views

RAID 10 (2+2) and (4+4) - terminology or physical setup?

I understand what RAID10 (2+2) is (stripped mirror) whereby there are data are striped across 2 groups and each group have a pair of mirror devices (2 disks). This is how i have understand "2+2" For ...
1
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2answers
291 views

libvirt Storage Backend

libvirt supports several storage backends[1] for hosting the image on a different server. We have 6 servers running about 40 VMs. Up to now we use local storage. To minimize the downtime we want to ...
0
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4answers
427 views

best filesystem for an aws s3 like service

I need to build a fault tolerant, highly available key/value storage (no posix, only same functionaluty as S3) using cheap existing hardware. The storage should be able to handle several billions of ...