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

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0
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0answers
13 views

Linux Ubuntu 16.04.1 UFS: Warnings in Dmsg and Console. ZFS

Why am I getting these warnings on my ZFS disks? ALl disks but sda are ZFS I'm guessing its nothing to worry about though. OS: Ubuntu 16.04.1 LTS, no external PPAs or repos Whole DMesg Warning ...
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
vote
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 ...
2
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0answers
22 views

stat() mtime is in the past, despite fsync

This might be a bit esoteric, but I've got an odd sort of a problem with stat(). Specifically - on a Linux system, with Isilon storage NFS mounted. I have a process that is getting time differences ...
43
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12answers
36k views

ZFS vs XFS

We're considering building a ~16TB storage server. At the moment, we're considering both ZFS and XFS as filesystem. What are the advantages, disadvantages? What do we have to look for? Is there a ...
0
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0answers
9 views

hus130 get configuration report by hitachi command suite 8 interface or element manager

I have a question about Hitachi and its products. I have Command Suite 8 and several storage systems, such as VSP, VSP G1000, USP_V and HUS130. In VSP systems i can download a configuration report by ...
0
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0answers
17 views

Secure Storage Requirements in the Cloud [closed]

I'm trying to understand some low-level security requirements for a cloud based secure storage solution. Specifically, I'm interested in the following: What mode of encryption (and integrity ...
0
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1answer
31 views

setup LVM to combine local and network block devices?

Because my local RAID-based logical volume is not big enough, I am thinking to extend it to a network block device. I am aware that when read/write to the network block device, the performance is ...
-2
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0answers
12 views

Small Business Storage/Server Solutions [closed]

we're a small graphics production company and I'm looking for a storage/server solution for us. We currently use a Netgear RN31400 NAS to store and access our graphics, survey, and production files. ...
4
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2answers
45 views

ZFS L2ARC for Mirror Pool

I was reading up on L2ARC for my ZFS. I currently have two Pools, One for Data, and the other for Linux Containers and Virtual Machines. I would like some help with L2ARC, I know how to add it but was ...
0
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0answers
4 views

VMWare Shared Storage not Syncing File Changes [migrated]

So, I am experimenting with a couple VM's. Both are fresh Ubuntu 16.04 installs, no updates, no vmware tools. Both are able to read and write to this SharedTest.vmdk, while both are running. What I ...
-1
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0answers
12 views

Multiple SAS Controllers [migrated]

I am in the process of creating a custom server for which I have the ability to have over 20 HDD's in this device. I want t be able to make good use of a large number of 2TB and 3TB HDD's I have. ...
3
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1answer
31 views

KVM direct disk access vs raw files

I have to setup 14TB of raid storage space (which just shows up as /dev/sdb). My question is: Is there any impact on performance from a kvm guest if I create ext4 on this large drive directly, mount ...
1
vote
1answer
16 views

Use Ceph as redundant storage for failover FTP service?

I need to setup a redundant FTP storage service that can survive one server-crash. I have two servers SrvA and SrvB that shares a virtual IP IpVirt (an IP that will usually point to SrvA but that ...
0
votes
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. ...
0
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1answer
41 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 ...
0
votes
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 ...
-3
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0answers
14 views

How do you build a server with scalable storage [duplicate]

I've been running a couple of web and mail servers for a while. However, I often get into hard disk space issues. For instance the mail servers often fill-up and I've to free-up space by moving emails ...
1
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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 ...
1
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0answers
15 views

Samba Share on remote machine

I'm with the following environment: I have 3 computers: A machine working as a storage (Ubuntu 14.04) (Khan), a Samba Server (Ubuntu 14.04 with Samba 4.3.9 with a NT4-like Domain) (Vader) and a ...
3
votes
5answers
16k 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
votes
1answer
33 views

Massive /dev/shm RAM drive unused, safe to shrink?

today I ran the command df on my CentOS 6 - MySQL/Sphinx database server linux machine (with 80GB of RAM). Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda2 ...
0
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2answers
66 views

Confused about Azure Storage Performance

In my experience so far with Azure the biggest bottleneck seems to be Storage performance. I did a few tests with Crystal Disk Mark and as you can see below the performance is very poor. Especially ...
2
votes
1answer
323 views

esxi passthrough storage adapter

I run ESXi 5.1.0 (HP version) on HP ProLiant ML310e G8 v2. There are 2 Storage Adapters: Smart Array P222 Dynamic Smart Array B120i Storage Adapters are visible in ESXi/Storage Adapters. Storage ...
0
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0answers
40 views

Why is the free space in a storage pool less than the capacity?

I'm trying to set up a new storage pool using 2 physical disks in my system. The sceneario is as follows: I have 2x 3TB HDDS in the machine. The machine's BIOS doesn't support booting from GPT :( ...
23
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10answers
14k views

Distributed Storage Filesystem - Which one/Is there a ready to use product?

With Hadoop and CouchDB all over in Blogs and related news what's a distributed-fault-tolerant storage (engine) that actually works. CouchDB doesn't actually have any distribution features built-in, ...
0
votes
1answer
37 views

JBOD Storage Configuration on new Build Ideas and Assistance

I'm new to storage, and I'm building out a new server for my client. I am more of a networking professional (CCNP, JNICP, Palo Alto), so this is brand new to me as I try to learn this. I've been ...
-1
votes
2answers
56 views

ESXi Host Supported Maximum Physical Hard Drive

Does anyone know what is the maximum physical hard drive space a single host of ESXi 6.0 can support? And no, this is not that dumb because Microsoft only supports a maximum storage of 64 TB. I am ...
1
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2answers
90 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 ...
20
votes
8answers
35k views

RAID-5: Two disks failed simultaneously?

We have a Dell PowerEdge T410 server running CentOS, with a RAID-5 array containing 5 Seagate Barracuda 3 TB SATA disks. Yesterday the system crashed (I don't know how exactly and I don't have any ...
0
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0answers
40 views

Need disk UUIDs in KVM guests

I'm porting a virtual server cluster solution from ESX to KVM (libvirt) and am running into a bit of trouble. In order for our propietary volume manager to label and slice the virtual disks, we had to ...
0
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0answers
54 views

kvm virtualized Windows get low disk performances

Disclaimer This is indeed a continuation of this thread. I've opened a new question as the target has slowly shifted, therefore I think was good to open a new post. I will merge back if required. ...
0
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0answers
26 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
20 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
22k 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 ...
-6
votes
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
votes
2answers
32 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 ...
1
vote
1answer
27 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 ...
-1
votes
2answers
64 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
vote
0answers
16 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
votes
1answer
29 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
28 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 /etc/iscsi/...
0
votes
0answers
16 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 ...
-1
votes
1answer
88 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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0answers
30 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 ...
0
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0answers
34 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
votes
1answer
65 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 ...
1
vote
0answers
35 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
votes
1answer
708 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 ...
0
votes
0answers
14 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 ...