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

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4answers
3k views

Creating bootable Fedora USB with persistent storage

I am attempting to burn the full Fedora 19 x86_64 DVD iso to a USB drive and have a separate partition on it for a kickstart file / other media that will be installed in the kickstart process. With ...
2
votes
1answer
525 views

No LUNs visible on ESXi 5.5 using Brocade 825 connected to EMC VNX 5300

We've just bought a new Dell PowerEdge R620 to replace the oldest of our 3 hosts in our vSphere cluster. The existing hosts are connected to our EMC VNX 5300 SAN using gigabit ethernet which is a ...
3
votes
1answer
336 views

Is there any downtime when expanding a volume on an iSCSI setup using Synology Hybrid RAID?

The subject sums up the scenario. I believe the answer is there is no downtime but the system might simply be slower during the rebuild. Which is fine. But if there is downtime, how long? A small blip ...
2
votes
0answers
25 views

Maximum size of a virtual pool in SCVMM 2012R2

I have a Windows Server 2012 R2 running SCVMM 2012 R2 and an over-committed virtual storage pool. In Server Manager the capacity of this storage pool is 128TB which translates to 140TiB which makes ...
6
votes
1answer
410 views

Replace HP Smart Array E200i without losing data

I've got a Smart Array 200i which seems to have some bad slots (slot 3 and slot 5). It doesn't matter what HD I put in these slots, it keeps telling me the drive is bad. My question is two-fold: Is ...
6
votes
3answers
377 views

With 200TB of needed storage, is a SAN a good idea?

My employer has, what I consider to be, a lot of data. We currently have about 10TB of data on our NAS, which is about its capacity, and we would have more data on it if we didn't constantly move ...
1
vote
2answers
617 views

Why I cannot initialize disk to MBR in server 2012 with the new Server Manager?

Why I cannot initialize disk to MBR in server 2012 with the new Server Manager ? just GPT is allowed?
-3
votes
1answer
135 views

Find RAID controller under Linux [closed]

I have been trying to find the RAID controller for good purpose. I need to find the right driver that works with the RAID controller. I can assure you i have a raid system in my server, here is an ...
0
votes
0answers
677 views

smartctl error end_request: I/O error, dev sdb, sector

I have a Scientific Linux 6.5 server with a RAID with SSD disks. I see several error on dmesg file but there is no alert or errors provided by the utilities of the RAID controller (LSI controller). ...
1
vote
1answer
62 views

HP arrray - XP and EVA - performance monitoring

I have some HP arrays I'd like to monitor for performance. I'm making a reasonable amount of progress with my 3PARs, in using ssh connectivity and show... commands to gather performance information ...
77
votes
6answers
16k views

Why is Enterprise Storage so expensive?

This is a Canonical Question about the Cost of Enterprise Storage. See also the following question: What's the best way to explain storage issues to developers and other users ...
0
votes
2answers
271 views

Getting an LSI SAS1064e to recognise new drives

I have an IBM x3200 M3 server running SBS2011. This server has an LSI SAS1063e controller (the basic BR10il RAID controller that comes with that system). Already existing was a RAID1 array of two ...
-1
votes
1answer
46 views

equallogic as direct network drive

at work we have an equallogic which currently does nothing. I know how to create volumes and configure the equallogic. But I am wondering if it is possible to use it as a direct network drive via ...
0
votes
1answer
114 views

sg_map & lsscsi showing old storage version

I am using SUN storage and recently upgraded/refreshed my ISCSI LUN storage. We have replicated old storage to new storage and attached to our servers. I can see at SUN storage side that storage is ...
3
votes
2answers
154 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 ...
0
votes
2answers
95 views

1 x Raid card and 6 sata drive over 1 SFF-8087 port [closed]

I have a question regarding LSI00328 LSI MegaRAID SAS 9271-4i Can I connect 6x sata drives to -4i card or I need -8i version
0
votes
1answer
71 views

Debian Installer Partman and reserved blocks

I did this preseed configuration but I'm unable to remove the percentage of reserved blocks directly from the partman recipe. It seems that the option "partman-basicfilesystems/specify_reserved" is ...
5
votes
1answer
1k views

Gluster + ZFS, deadlock during benchmarking: zfs_iput_taskq 100% cpu

First some background: I work at a company that runs a PHP-webapplication. We have a storage backend mounted over NFS on several webservers. Today we have the issue if one webserver writes a file over ...
5
votes
1answer
86 views

Netapp raid scrubbing on a V-Series

My V-Series NAS is running ontap 7.3, and gets all its disk from a SAN. LUNs are provisioned to the Netapp, which puts them into a raid-0. The SAN itself, of course, uses RAID with scrubbing and ...
1
vote
1answer
43 views

Get-MaskingSet in PowerShell 2.0

I'm trying to retrieve the current masking sets using PowerShell 2.0 on a Windows Server 2008 R2. Unfortunately, the cmdlet Get-MaskingSet does not exist under this PowerShell version. Are there any ...
4
votes
2answers
1k views

Repurposed disk - Linux blkid command returns incorrect information

I'm working with an SSD drive removed from a VMware ESXi installation. I'm trying to reuse the disk in an existing Linux installation (CentOS 6.2). The drive sits behind an HP Smart Array P410 RAID ...
1
vote
1answer
212 views

Linux: Listing all local and SAN disks on a host

I am attempting to list and categorize all connected disks on a host; local and SAN-connected. The SAN use various types of adapters (namely Emulex and Qlogic) so scanning the FC bus can be somewhat ...
0
votes
3answers
354 views

qemu don't start quest with disk image on tmpfs

I have 32bit windows 2k3r3 guest (terminal server) with 4GB guest ram and swapping. I created separate disk image for guest swapping and user's temp dirs. I have enouth RAM in host system and want ...
0
votes
1answer
123 views

Interpreting /proc/diskstats for a webserver: more writes than reads?

Thanks to this answer I was able to see the total reads+writes for my apache webserver: [root@barricade ~]# cat /proc/diskstats | grep sda 8 0 sda 653416 315344 72474412 17441745 4597621 ...
0
votes
1answer
62 views

How big are my disk arrays?

On my SunOS 5.10 host are there 3 Sun 6140 disk arrays, and I would like to know the disk capacities. According to zpool list do I have a 5TB and 16TB pool. format shows me only 12 disks c2t1d31: ...
0
votes
1answer
79 views

Display the number of I/O to disk (reads/writes) since the last boot on CentOS

Is it possible to use iostat (or some other tool) to get the number of reads/writes operation "since the last server reboot"? I mean: I'd need to know how many reads/writes the server has done since ...
1
vote
2answers
222 views

Modify CIFS share ACL's

I would like to modify permissions on a number of NetApp CIFS shares (over 100). These are user shares and each share has a different user with "Change" share permission, this permission now needs to ...
-2
votes
1answer
46 views

0.5 TB SQL Server Database, is it possible to store in a standalone server? [closed]

We are facing the task of storing of 0.5 TB of data in a SQL Server 2008 Server. Is it possible to do it in a standalone server? Later we also want to query for generating statistics of the data (a ...
-2
votes
1answer
220 views

CentOS 100% full disk, but no there any large file [closed]

In my CentOS server, hard disk is full but no there any large file in hard disk. I check files size with du command When i reboot the server problem is solve but after 1 or 2 days this problem happens ...
53
votes
1answer
900 views

Fibre channel long distance woes

I need a fresh pair of eyes. We're using a 15km fibre optic line across which fibrechannel and 10GbE is multiplexed (passive optical CWDM). For FC we have long distance lasers suitable up to 40km ...
2
votes
3answers
2k views

What is the difference between a HBA card and a RAID card?

I thought I knew the difference between HBA and RAID. In my mind, HBA is offloading from the main motherboard/CPU and is simply JBOD... usually has an external SAS ports, whilst a RAID card does the ...
1
vote
1answer
268 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
vote
0answers
380 views

Sizing of journal disks with Microsoft Storage Spaces parity volume

I'm currently speccing out a new backup server. It's going to be running Windows Server 2012 R2 with Direct Attached Storage, and I'm considering using Storage Spaces rather than using a RAID card. ...
43
votes
7answers
4k views

Probability of Blade Chassis Failure

In my organisation we are thinking about buying blade servers - instead of rack servers. Of course technology vendors also make them sound very nice. A concern, that I read very often in different ...
0
votes
0answers
25 views

local RAID vs server RAID with a 10GbE connection [duplicate]

we are trying to configure a descent size (in layman's perspective) storage at my lab. I am a skilled programmer, but my knowledge in hardware at non-consumer level is very limited at this point. At ...
5
votes
4answers
11k views

Howto check disk I/O utilisation per process

Im having a problem with a stalling Linux system and I have found sysstat/sar to report huge peaks in disk I/O utilization, average service time as well as average wait time at the time of the system ...
-2
votes
1answer
324 views

Why does a low level format take very long time?

I can write ~100MB/s on a particular 4TB SAS drive when it have a file system on it, but a low level format on this drive took >16 hours. That's ~70kB/s. Since there is not filesystem and only zeroes ...
0
votes
0answers
54 views

Creating file server failover cluster

I'm in the process of setting up a new file server cluster with a shared iSCSI disk. I've been through the setup of iSCSI and MPIO and the disk has been initialized, formatted and brought online. ...
0
votes
2answers
260 views

Can a NetApp disk array be used as a JBOD?

I have a bunch of (old) NetApp DS14MK2 disks arrays with Fibre Channel connections. I wouldn't use them to anything critical, but instead of throwing them out, could I use each of them as a separate ...
0
votes
2answers
79 views

Possible to put larger disks in LSI arrays?

I have a couple of these LSI arrays LSI Model: 0834 LSI Class: 3600 LSI Name: LSI Engenio LSI product name: 1932 LSI Product codename: Mary Jane Enclosure name: Shea (DM1300) End of Life: 31-Dec-2010 ...
-8
votes
1answer
96 views

What is a Fibre Channel disk? [closed]

Our NetAPP SAN uses something called "Fibre Channel" disks. What are Fibre Channel disks, and does this mean that I can't replace them with a NetApp SATA or SAS disk?
1
vote
1answer
890 views

How can I reset the Storage Manager password on a IBM DS5020 Storage Array on network using telnet?

I have an IBM DS5020 Storage Array to which the Storage Manager password is lost, but it has been configured on a network and the IP Address is known. How can I reset the password remotely without ...
0
votes
1answer
72 views

AWS SSD Volume pricing and IO requests [closed]

I'm looking at the pricing for the new SSD storage volumes here, and I see that there is no listed charge for per 1 million I/O requests like there is with magnetic volumes. Does that mean there is ...
0
votes
1answer
418 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 ...
0
votes
2answers
499 views

RAID consideration for 24 Disk Array

I have here a 24 Disk Array with 3.7 TB disks in it. What would be, performance wise a good configuration when using a RAID 6: RAID 6 over all 24 disks or should I use 2x12 disk RAID 6 and than a RAID ...
0
votes
1answer
72 views

Creating a scalable back-up cluster with one interface and retention

Currently I'm running a number of back-up servers to back-up other servers with, e.g. b01, b02, .., bn, all with their own IP's, running their own FTP / SSH services. However, I would like to create ...
1
vote
1answer
316 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 ...
7
votes
2answers
147 views

Array free space requirement

The general rule of thumb is don't use more than 80-85% of your capacity, otherwise performance degrades sharply, and other bad stuff may happen. On a 8TB array, this comes out to around 1.6TB of ...
2
votes
1answer
175 views

Issue deleting files from a NetApp Windows Share

At work we have a NetApp Windows Share setup. I browse with Windows Explorer to a folder which contained thousands of text files. I then select multiple files at the same time and delete the files. ...
7
votes
1answer
4k views

mdadm and 4k sectors (advanced format)

There are numerous questions on Serverfault about aligning 4k sectors disks, but one thing is not really clear to me yet. I successfully aligned my RAID1+LVM. One of the things I did was use mdadm ...