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

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1answer
48 views

Removing all hw raid from Sun server

This post is about the same server as this post, where multiple disks were in a LUN, and then ZFS was used to make the ZFS pools. I would like to use the 6140 disk arrays as JBOD's on either Linux or ...
0
votes
0answers
12 views

Debian used + available does not equal size (storage) [duplicate]

I'm trying to find out why /dev/sda1 Used+Avail != Size. I ran a df -h and the output I get is this: File system Size Used Avail Use% Mounted on /dev/sda1 320GB 683M 303G 1% ...
1
vote
0answers
21 views

Understanding VMFS storage usage

please help me understand something regarding used and available space on a datastore holding thin provisioned vmdk files. Im having an ESX 4.1 U3 VMFS 3.48 datastore called "storage1". This is 1....
0
votes
1answer
288 views

Azure blob storage custom domain verification - Azure telling me to create CNAME for non-existent address

I want to assign a custom domain name to my Azure blob storage account. In the custom domain setup page it says: You can map a custom subdomain name to your Blob service endpoint. Windows Azure ...
2
votes
2answers
92 views

More Global Spares or dedicated spares

I have 74 x 300GB disk on a HP MSA2324sa. The magic for me is 3 x RAID10 vDisks of 16 drives each. And then 2 x RAID50 vDisks of 10 drives each. That leaves me 6 drives. I could assign 5 dedicated ...
6
votes
2answers
354 views

What is reasonable storage failover time that most OS (VM) can tolerate?

I have a GlusterFS 2 node 2 replica setup. I am planning to use it as OpenStack instance store, in which the VM disk image is stored. From my tests, if the GlusterFS node which the hypervisor ...
0
votes
0answers
260 views

Linux LVM replicated Volumes

I am migrating storage arrays, on two sites.The DR site has synchronous block replication from main site that will be cut during the migration, however once the volumes are migrated the replication ...
4
votes
2answers
3k views

Why does docker-machine clear data on restart?

I'm using Docker Toolbox on OSX. I've created a data volume container for storing persistent data: https://docs.docker.com/userguide/dockervolumes/#creating-and-mounting-a-data-volume-container. I ...
0
votes
2answers
44 views

Server storage upgrade

I have a windows server 2012 r2 setup with the following storage: 1x 900GB Internal HDD (OS Drive) 1x 1TB USB SSD (Client computer backup drive) 2x 1TB USB SSD (C drive backup - hot swapped weekly ...
1
vote
2answers
317 views

Is it possible to dynamically resize emc lun which is using powerpath

*I have the below mount which is coming from EMC storage and uses powerpath drivers .Now Storage has resized this to 1.5 TB , is it possible to resize this in host without any downtime . [root@...
2
votes
2answers
92 views

SAN capable of 25,000 IOPS at 75kb avg. size, where will my bottleneck be?

I just want to double check my findings here, hope someone out there is able to weight in on some of this. Let's say I have a SSD storage array capable of delivering 25,200 IOPS and it is connected ...
2
votes
4answers
2k views

SATA vs SAS vs SSD for Virtual Machine Automation

We're using SCVMM and Hyper-V hosts to manage our Automated VM environments. Currently we have two servers with 3 7.2k consumer drives each (one for host OS/Storage, two for VMs). It's hard to say ...
1
vote
0answers
237 views

fdisk and parted won't work on a USB stick with Fedora 23 alpha 2 x86_64

So I burned a Fedora 23 alpha 2 on a 16GB USB stick through dd if=path/to/fedora.iso of=/dev/usb_device bs=512 I used bs=512 because the sectors on the stick are 512 bytes. Opening the stick in ...
-5
votes
1answer
50 views

What's the minimum latency achievable for a shared drive? [closed]

I have a server application that uses an on-disk cache for certain data (100GB-1TB of it). Now I want to use multiple instances (10, 100) of the server application (each on a separate server), and all ...
0
votes
2answers
753 views

How to delete files on NetApp ONTAP 7 by using CLI

As a volume containing a LUN filled up to 100% on a NetApp FAS running ONTAP 7.x, the LUN went offline automatically, stopping the VMs. Now we need to delete snapshots or files on the volume to ...
1
vote
0answers
34 views

dmcache - is removing cache device without suspending safe?

I'm using plain dmcache for SSD cache - unmount procedure goes this way: umount fs suspend cache device remove cache device close lvm close LUKS shutdown However sometimes dmsetup doesn't allow me ...
0
votes
1answer
1k views

Xenserver 6.5 Backup Solutions [closed]

I'm looking for a way to backup up VM's in my Xenserver 6.5 environment. I'm open to scripts or installing some tools/clients but it need to opensource. We want to backup to our Dell MD3660i SAN as ...
1
vote
1answer
143 views

How do I expand a PowerVault MD3000i virtual disk?

I have a PowerVault MD3000i connected to a PowerEdge 1950 via iSCSI. The MD3000i has ~7TB of space. We want to use pretty much all of this space as one large file server configured with RAID 5. We ...
9
votes
3answers
2k views

Best practice for 24 Disk Array

we have just migrated for our old fibre SAN storage to an IBM v3700 storwize with 24 SAS 600GB disks. This storage is connected directly to two IBM ESXi 5.5 servers each with two 6Gbps multipath SAS ...
2
votes
1answer
185 views

3PAR high service time overnight

I've a recently upgraded 3PAR array ( 3.2.1 MU1) , which overnight is getting some high iowaits - to the point where some paths to drop and servers to crash (particularly noticeable with e.g. Oracle). ...
1
vote
1answer
112 views

Striping LVM Across Multiple MD-RAID Arrays

I have a machine with three, fifteen drive mdraid RAID-6 arrays (md10, md20, md30.) These three arrays are then setup as physical volumes for LVM and combined into a single volume group. I then have ...
-1
votes
3answers
125 views

load balance across several SSDs in a server

I would like to have a volume spanning several SSDs or HDDs in my server. When I write a file to this volume, the file is written in whole to one of those drives chosen randomly or in round robin ...
0
votes
1answer
45 views

SAS Expander Drive Compatibility

To my knowledge a SAS Expander reports the hard drives transparent to the Host or Raid Controller. If I want to use 4k native drives (4kn), do the Expander also have to be capable of 4kn drives or ...
1
vote
1answer
89 views

Monitoring HP MSA2324sa using OpenNMS

I was able to get an HP MSA2324sa storage array connected to a server after someone's advice on here to scan the SCSI bus. Now, I want to monitor the following on the storage using SNMP and OpenNMS: ...
1
vote
1answer
116 views

How to connect HP MSA2324sa to server?

I'm having issues with an HP MSA2324sa array. I connected it to the server and the server does see it however, I am not getting a /dev/s* device even though I have properly mapped the host from the ...
1
vote
0answers
87 views

HP MSL2024 not auto changing tapes using Ultrabac 9.2.2

I am using Ultrabac 9.2.2 to run backup sets to a one drive HP MSL2024 tape library. It's currently connected via SAS 3Gbs to a HP Proliant DL380G6 running Server 2008 R2. I have the drivers from HP ...
0
votes
2answers
156 views

What is the maximum ProLiant DL580 G3 SCSI or SAS drive capacity, and are only HP drives permitted?

I was recently given a free HP ProLiant DL580 G3 configured for SCSI drives from out of a datacenter. I understand that this is an older unit, and reliability may be questionable at best, but in my ...
1
vote
2answers
108 views

RAID 6 - any write amplification in 4-drive RAID?

We're planning to move from a 4-drive RAID6 to a SSD RAID 1, and I was analyzing smartctl data to see how many GB we've writen to the drives over the past year so I can estimate the lifetime of the ...
4
votes
2answers
206 views

Identify which drives belong to a specific HP RAID 5 Group

A total of 32 drives were removed from x4 decommissioned HP DL380 G6 servers (eight per server). The setup of the eight drives per host was into two RAID Groups: RAID 1 = SLOT 1, 2 = ESXi OS RAID 5 = ...
0
votes
0answers
99 views

Windows Cluster An error was encountered while determining shared storage

Our SAN manager has added a new disk for our cluster. this is a new 6TB disk that will be used for backup and will be part of a file share. I have put the disk online, initialized it and assigned the ...
5
votes
1answer
753 views

NetApp Backup Strategy - Snapshots to SnapMirrors to Tape?

In a previous question we discussed the pros and cons of relying exclusively on NetApp snapshots for backups. I now find myself in this situation as our aging legacy Symantec BackupExec tape server ...
0
votes
1answer
600 views

coreos mount cifs or sshfs or any other networked file system

For development I want to mount a file share from my windows dev box inside my CoreOS VM, so I can then mount that volume inside a container. CoreOS doesn't appear to support doing this, and comes ...
-2
votes
1answer
51 views

Challenges of dealing with large disks/partitions

Currently doing research on creating a new file server. Server will be Linux based (CentOS 7) and will need to have around 8 TB of available space. Samba will be used to share the files. I am trying ...
2
votes
2answers
1k views

Optimize Linux file system for reading ~500M small files

We're seeing performance problems on a file system that contains ~500 M files that are relatively small (typically tens of kb) and ~150 K directories. Files access is predominantly reads and writes ...
-1
votes
1answer
28 views

Expanding Storage by adding a second server? [closed]

I don't know if this is possible "out of the box" but here goes: I have a dedicated Linux server with a LAMP kind of installation. It is being used as a cloud storage. The server is slowly getting ...
2
votes
1answer
372 views

NetApp - Snapshot Full

I am seeing a bunch of Snapshot Full warning events being generated recently from various volumes on our filers: A Warning event at 22 Jun 10:03 Alaskan Daylight Time on Snapshot ...
0
votes
1answer
935 views

How to list all files of a partition on linux?

I am running out of disk on my rhel box. I am trying to find all files in /dev/sda2. Do we have a command which can give all files (ideally, with size) in filesystem /dev/sda2? /dev/sda2 31297508 ...
0
votes
1answer
86 views

RAID1: approx performance difference of 3 active vs. 2 + spare?

My question concerns only Linux software RAID ("md"). I'm going to set up a RAID1 array with three devices. I need to choose between using the third disk as a spare or as an active member of the ...
4
votes
1answer
47 views

7-Mode snapmirror status post link change

In a Netapp with a snapmirror relationship to another Netapp in 7-mode, what are my options of checking replication performance through Data Ontap? We upgraded the link and want to know how snapmirror ...
0
votes
1answer
407 views

SATA Hard disk on RAID controller does not show on windows, and healthy on BIOS

We have a WIN2012 R2 server (3 x SSD 1T each, 1 x SATA 2TB), each drive is being put on it's own RAID (reads 4 "Adaptec Array SCSI Disk Device) on device manager in windows "disk drives" section ...
2
votes
1answer
158 views

Apache Spark infrastructure - combining compute and storage nodes

I have an infrastructure question around Apache Spark, which I'm looking at rolling out in a greenfield project with (at most) approximately 4 TB of data used for modelling at any given time. ...
1
vote
3answers
117 views

How can I enable caching on the RAID card or Hard Disk(s)

I've got a HP ML350 G5 server running 6 disks as two RAID-5 configurations. This server has been notifying me of an empty battery on the E200i card. This seems to result in disabled cache: read and ...
1
vote
2answers
309 views

How to fix my broken raid10 array

I have a RAID 10 consisting of 4x3TB drives. It had become degraded (sdd had dropped off). I thought I had fixed it and it was rebuilding, but now (I think) sde appears to be causing problems. root@...
1
vote
2answers
58 views

Converting from RAID 1 to RAID 0

We have 2 x 600GB SAS 15K drives configured in RAID 1 through a PERC H710 RAID controller in a PowerEdge R620. Question. Can we convert this to RAID 0 without having need for a OS reinstall? If so, ...
3
votes
0answers
72 views

S3 + Cloudflare vs S3 + 2 Web Server + Cloudflate

Currently, I run two websites and each site own it own big server. Currently, all of those two sites has roughly 300GB of images. Its grow rate is 15GB of images per month. I know that eventually, one ...
5
votes
2answers
333 views

Windows Server Manager stuck on 'Display will be complete when the server inventory has finished…'

I cannot access Storage Pools in Server Manager because it seems that it's stuck on 'Display will be complete when the server inventory has finished...'. The little blue bar up top keeps running, so ...
0
votes
1answer
23 views

How to show degraded pool under SCVMM?

Does SCVMM show degraded pool information? When a disk, which is part of a storage pool, goes down, therefore changing the pool status, where and how can I see this information under SCVMM? Server ...
3
votes
1answer
58 views

why are zfs on linux transfer rtates reported incorrectly after expanding array?

I have upgraded the drives in a 4 drive Raidz array in a NAS server and the array has auto expanded to the new size. In testing transfer rates from the NAS server now I observe that when performing ...
4
votes
1answer
59 views

Network Filesystem fails during high I/O Speeds

I am a user on a cluster using NFS for our data storage needs. Recently, I have been running a pipeline which has very high I/O during some operations. The program we think is causing the problem is ...
2
votes
2answers
240 views

error: no space left on device when saving file (but there is space)

I am implementing in ruby however when I want to save my work I get "Opening output file: no space left on device, /afs/edu/usr7/ael/p\ rivate/RUBY/inc.rb" When I checked if I got any space using ...