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

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3answers
3k views

3WARE 9650-4LPML JBOD DISK to RAID - 1 Mirror Migration How To?

It is possible to migrate a single disk, to Raid 1 as per Table 10 in the User Guide Page 122: http://www.3ware.com/support/UserDocs/3ware9650SE-UsrGuide.pdf I am trying to find what the best method ...
6
votes
4answers
6k views

SAN or NAS 100-200TB - where to start looking? [closed]

I'm starting a project to consolidate a bunch of data and make it available on our LAN. I'm thinking that we may have a need for anywhere from 100-200TB at any one time. What factors should I be ...
4
votes
2answers
6k views

DPM 2010 has allocated 100% of our storage pool. What are our options?

Data Protection Manager 2010 has allocated 100% of our storage pool. We currently have all our protection groups set to 'automatically grow the volumes' [checkbox]. As we were trying to add a ...
2
votes
1answer
56 views

Consolidating SQL Server

We have a number of SQL Server 2008 R2 standard servers, each for a single application that we'd like to consolidate into one physical server. Running perfmon on these servers they're not using a ...
5
votes
1answer
444 views

How long is the “defined grace period” for the idle scheduling class of the CFQ io scheduler?

The ionice man page says A program running with idle io priority will only get disk time when no other program has asked for disk io for a defined grace period. Where is this "grace period" ...
2
votes
1answer
317 views

How can I determine the specific file referenced by fs_usage, which is listed by block

I was investigating a problem on a Mac OS X 10.6.8 Server, where users were complaining of access slowdowns. Network throughput slowed to a crawl. It felt like the server was overburdened. System ...
6
votes
1answer
585 views

Completely disjoint iSCSI networks vs dedicated switches and VLANs

I'm looking for best practice or pros/cons for deploying an iSCSI storage network. The two options are: A completely disjoint iSCSI storage network Dedicated switches with a separate VLAN for ...
0
votes
1answer
794 views

Can a backup server HBA be zoned into 2 tape drives without confusing applications?

| tape drive 1 | ---- | switch 1 | ---- hba1 | backup server | hba2 ---- | switch 2 | -----| tape drive 2 | Our backup server has 2 FC HBAs. Each is zoned into a different drive on the back of the ...
12
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5answers
6k views

Any experience with SATA SAS Interposer Cards?

Driven by the current price difference between SATA and SAS disks on one side and the potentially bad behaviour of SATA disks in bigger storage arrays on the other side, I have found so-called ...
3
votes
2answers
2k views

Sheepdog versus iSCSI for KVM

What is recommended storage solution as VM count grows? We currently have 5 VM servers (8 core, 32GB) and one storage server. Currently we have ~80 virtual machines running and the storage server's ...
2
votes
3answers
225 views

Local attached storage versus NAS

I currently have 3 old NT File Servers that are about to die, which have no disk level redundancy. We're considering buying drives and attaching them to a newer server that would serve files, but I ...
12
votes
3answers
9k views

Tuning Linux disk caching behaviour for maximum throughput

I'm running into a maximum throughput issue here and need some advice on which way to tune my knobs. We're running a 10Gbit fileserver for backup distribution. It's a two disk S-ATA2 setup on an LSI ...
0
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1answer
261 views

What's the best file system for a 200TB Array on a MacOS 10.7? [closed]

We have a Mac server (10.7) with a 200TB disk array. We're trying to decide between HFS+ and the unsupported ZFS. Which should we use, why, and is there another choice that we haven't considered?
1
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3answers
2k views

HP DL585 G1 with VMware ESXi 5 - SATA solution, need more storage

I have the following: 2 x DL585 G1 (8 cores) with built in Smart Array 5i (2 x 74GB SCSI in Raid 0) I installed VMware ESXi 5 and got it all working :) However I need more space. I was thinking ...
-1
votes
2answers
250 views

Cross platform, blob storage system

I have a couple of different servers around the house, and a lot of storage on each of these machines. I also have a couple of dedicated servers, and some VMs on these boxes... Most of the boxes and ...
2
votes
1answer
2k views

VMWare VMs to Data Domain storage via EMC Networker backup: Do I need a storage node?

I've got several VMs (Windows Server 2003-2008 R2, application servers, Exchange, SQL, small file servers) residing on ESXi 4.1 hosts. We recently purchased a Data Domain system allowing us to backup ...
-1
votes
1answer
2k views

How to manage HP Array on MSA1000?

On the server I have two fiber channel in multipath that connected to MSA1000: 0b:00.0 Fibre Channel: Emulex Corporation Zephyr-X LightPulse Fibre Channel Host Adapter (rev 02) 0b:00.1 Fibre Channel: ...
1
vote
3answers
116 views

Backup a large library [closed]

I have a relatively large library of about 50TB that I need to back-up on at least a weekly basis. Currently, the video content is stored across an array of raided 3TB hard drives. I would estimate ...
0
votes
1answer
48 views

Media Being Hosted In SVN For Web Application [closed]

I have a client who decided to use SVN to host the media files and pulled by a web application for viewing. What are the consequences of this, and wouldn't a better option be to use a NAS or CDN?
2
votes
3answers
2k views

What's the relation between “HP Diagnostics” the “Array Config Utility” and “Windows Disk Manager”

I have a failed drive that is reported in HP Diagnostics https://localhost:2381/hpdiags/frontend2/frontend.php? It tells me that Logical Drive 5 has a drive that is about to fail. The name of ...
1
vote
1answer
353 views

VirtualBox Fedora Host Windows Guest Networking and Folder Aliases

I'm new to running virtual machines and I have a couple questions. I have a Fedora 14 box with an 8 core Bulldozer processor that is running VirtualBox with Windows. This machine has several ...
0
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1answer
685 views

SAN Boot CHAP'd iSCSI Target?

I have a few computers on my network that boot via iSCSI (due to dead HDDs) using chainloaded iPXE over DHCP. I wanted to enable CHAP for my iSCSI target to increase security (and learn). However, ...
9
votes
1answer
1k views

2.5 inch drives versus 3.5 inch drives

I am looking for some publicly available comparisons between 2.5 inch drives and 3.5 inch drives. What I had assumed is that a 2.5 inch 15k drive and a 3.5 inch 15k drive would have identical ...
1
vote
1answer
288 views

RAID5 Array issues - copy data or replace drive first

I have inherited a critical situation as follows. 2 x 16-Disk RAID5 Storage systems (one holding master data, one holding backups) Backup system had no monitoring and two disks failed so all data ...
1
vote
2answers
215 views

LTO(4) Tape Physical Storage

We have moved to an LTO(4) tape backup system. It works great and now we have a stack of physical tapes lying around that need to be stored and ultimately secured. I was curious what options exist ...
3
votes
1answer
3k views

Is Microsoft's “Storage Spaces” just LVM for Windows? [closed]

From initial reading, it looks like Microsoft's forthcoming "Storage Spaces" is an LVM-like tool for Windows. Is this a correct assessment? If it's not merely LVM-for-Windows, then what is it, and ...
1
vote
2answers
528 views

Adding nearline SAS disks to a controller with SAS disks

I have a Dell Poweredge 840 server that currently has a pair of hot swappable 146Gb SAS disks attached to a SAS 5IR controller, configured as RAID 1. I have two spare slots to add two add more ...
1
vote
1answer
364 views

How to connect drive array to redundant motherboards?

How should one connect a small storage array, four 3TB SATA drives for now, to two motherboards or controllers as a failover system? This means avoiding adding another single point of failure such as ...
3
votes
1answer
527 views

Installed 2TB disk in ubuntu server, dmesg reports it as 9444732965540666 MB

I've have an ageing Linux server running on Dell PowerEdge hardware, with a SAS 5IR RAID controller. It has a pair of SAS 146Gb disks in a RAID 1 configuration that has the OS and other software. I ...
26
votes
4answers
22k views

How to move files between two S3 buckets with minimum cost?

I have millions of files in a Amazon S3 bucket and I'd like to move these files to other buckets and folders with minimum cost or no cost if possible. All buckets are in the same zone. How could I ...
1
vote
1answer
99 views

250 users with a data dir on a central server - how would you set it up?

I'd like to get best-practice advice on how to setup a scheme where 250 users or more have OS independent access to their own data-dir / user-dir on a central server in the local network. from the ...
4
votes
4answers
4k views

SAS Expanders for DIY JBOD Arrays

I am researching making a DIY SAS array much like the Dell MD1000. My understanding is that these devices do not contain a RAID controller, instead they present all the drives on in SAS domain to the ...
8
votes
2answers
540 views

Are branded backplanes useable without specific controllers?

I can't find a disk enclosure which I like, so I'm going to build a custom one (if nothing else, that'll teach me to be picky...). I've got a few HP SAS backplanes lying about, but I'm wondering if ...
1
vote
2answers
566 views

Can NetApp's WAFL export snapshots to files?

An exact copy of a ZFS file system can be made with snapshots using zfs send/receive. Can something similar be done with NetApp's WAFL, where you make a snapshot and export it to a file?
0
votes
2answers
657 views

How to backup NetApp storage on Linux? [closed]

Our NetVault license is about to expire within the next year, so what alternatives are there on Linux? We have 20TB and many millions of files, so time on the backup window is important. The backup ...
0
votes
2answers
73 views

parted subtracting partition size 16896 from size given

When I create a partition using parted(mkpart) giving unit as Bytes, it is creating "size given - 16896" byte sized partition. Is there any specific reason to less 16896 bytes from the partition ...
9
votes
6answers
45k views

VMware VMFS5 and LUN sizing - multiple smaller datastores, or 1 big datastore?

With VMFS5 no longer having the 2TB limit for a VMFS volume, I'm considering which scenario would be more beneficial overall:- Less LUNs of larger size, or More LUNs of smaller size. In my case, I ...
1
vote
4answers
152 views

Calculating risk vs cost for server storage

This is a request for 2 different types of information: Is there a formula that can/should be followed to calculate risk vs cost of server storage? What factors should one take into consideration ...
0
votes
3answers
5k views

Maximum Size Limit for CIFS Share Accessed by Windows Server 2003 (32 bit) Client?

We have a CIFS share being served out by a NETAPP appliance. The CIFS share has grown to over 2 TB in size. A Windows Server 2003 32 bit-client accesses the share. Lets say, for example, the ...
1
vote
1answer
658 views

MySQL Cluster on SSD

We are planning to implement a four node MySQL Cluster and are considering using SSDs as the storage. We would like to get a high level of performance and very low latency on disk IO from the small ...
7
votes
5answers
28k views

How do I get my HP servers to email me when a drive fails?

Ideally, with as simple of install as possible and without requiring rebooting the servers. Mostly for DL380 G5's if it helps. Thanks.
2
votes
1answer
2k views

vmware esx 4.1 cant see existing SAN storage

I have 3 esx 4.1 hosts connected to HP EVA 4400 StorageWork. All host can see 6 datastore, LUN1 to LUN6, 1TB for each datastore. Recently I add another esx 4.1 host but unfortunately this now host ...
2
votes
2answers
174 views

lvm over two raid1's - one slow, one fast. What will happen?

Two software RAID1's, 0: 2x 15K SAS drives, 73GB 1: 2x WD Caviar Green, 3TB So the first RAID is a faster one, the second a slower data grave. What happens when I add both to a LVM logical volume ...
0
votes
1answer
849 views

Converter to use Sata HDD with IBM eserver x236

We have an old x236 machine with 2 70-GB SCSI disks installed on Ultra320 SCSI connector (check out the hardware manual). Now, we are planning to buy a new server in future and x326 would act as a ...
1
vote
1answer
465 views

Backup HFS+ filesystem to linux server

I am the sysadmin for a small company with 3 Xserves running OSX 10.6.8 containing mission critical data that need to be backed up in an automated fashion. To accomplish this, we are going to deploy ...
2
votes
2answers
172 views

What do you do when your site scales so much that uploaded_media can't fit on one machine? [closed]

What do you do when your site scales so much that your uploaded_media (in Django, where all uploaded media files from users is stored) can't fit on one machine? My personal case, I'm using Django and ...
2
votes
2answers
171 views

Storing 64000+ files and growing in one folder (ext3)

I'm using a directory as a staging area for my files before shipping them to Amazon S3 buckets. This staging directory has no sub-directory structure /a/b/c or /year/month/day ... it's only files ...
1
vote
1answer
163 views

ZFS: can per-user encrypted filesystems be deduplicated on block-level?

Let's assume I build a storage system where each user gets his/her own encrypted filesystem on top of a ZFS pool. Would deduplication on pool-level still work when each fs is encrypted? What ...
1
vote
2answers
467 views

ZFS: Best-practices doc state: “On systems with 1,000s of ZFS file systems…”?

The docs state: "On systems with 1,000s of ZFS file systems, provision 1 GB of extra memory for every 10,000 mounted file systems including snapshots." What does that mean - how do these people use ...
0
votes
1answer
97 views

Bandwidth efficient software RAID [closed]

I have this crazy idea .. that might just work if I find my missing piece Take network with 40 windows workstations (on 24 hours) Each machine uses 20 GB out of 500 GB capacity Install free copy of ...