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

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10 views

Reaching the limit of rsync/rsnapshot [on hold]

Since several years we use rsnapshot for backups. On some systems we reach the limit. There are too many files and only very few of them need to get backed up. Only about 0.1% of all files change on ...
-2
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0answers
15 views

How to store / organize millions of files on windows server [on hold]

My system runs windows service (written in C#). The service gets events and the product of the event is 2 image files (jpg files around 150KB each). The service runs on windows server 2012R2 with EMC ...
0
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1answer
28 views

Storage/backups options for a small business server running a file server

We are upgrading our storage capacity and backup procedure where I work, and I would like to have your input on this. We currently have a Windows Server (HP ProLiant ML310e Gen8: Xeon quad-core 3.3 ...
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0answers
14 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 ...
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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 ...
2
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0answers
23 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 ...
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 ...
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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1answer
34 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 ...
-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
votes
1answer
33 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 ...
-3
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0answers
15 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
vote
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 ...
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
votes
2answers
67 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 ...
0
votes
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 :( ...
0
votes
1answer
38 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
59 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 ...
0
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0answers
42 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
55 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
28 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
21 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 ...
-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
33 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
66 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
vote
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
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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
vote
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 ...
-1
votes
1answer
91 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
votes
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
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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 ...
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 ...
0
votes
1answer
38 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
votes
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 ...
3
votes
3answers
865 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 ...
2
votes
1answer
45 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 ...
0
votes
1answer
40 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 ...
1
vote
1answer
59 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 ...
1
vote
1answer
35 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 ...
0
votes
1answer
84 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
vote
1answer
175 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 ...
1
vote
4answers
143 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 ...
1
vote
1answer
25 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 ...
9
votes
2answers
450 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 ...