All Questions
63
questions
2
votes
2
answers
511
views
Distributed SSD cache for network storage
Our small computing cluster has 3 computing nodes and 1 file server. The file server has around 70TB data to be accessed by the 3 computing nodes. All of the 3 computing nodes have 3 4TB SSDs which ...
- 21
0
votes
1
answer
35
views
Does the data size of an SSD chip have compatibility issues with certain boards?
I'm considering getting an 8TB SSD storage chip for my Intel NUC mini-server (I install linux on it). However, I'm wondering if there are any considerations one needs to take when adding that much ...
- 103
0
votes
1
answer
649
views
Hyper-V: Benefit of Putting Virtual Hard Disks and Virtual Machines Folders on Separate Drives
Hyper-V has two folders 'Virtual Hard Disks' and 'Virtual Machines', the first stores the virtual disks themselves and the latter stores settings, snapshots, etc.
Is there's benefit of storing these ...
- 217
0
votes
0
answers
135
views
Ubuntu expand free disk space after RAID change
maybe someone can advise how to expand free disk space to SDA6 part?
Before I have used 2x960GB SSD (Hardware RAID1), now I have added +2x960GB SSD and made Hardware RAID10 (1+0).
Problem is now that ...
- 3
1
vote
1
answer
2k
views
Unlock SATA SSD locked with Dell's HDD password option in BIOS
Latest problem is a locked SATA disk. It is a Samsung 870 QVO SSD. It has been locked a long time ago with the Dell BIOS password utility. But because an admin password was set, the system never ...
- 21
1
vote
1
answer
692
views
HP ProLiant DL380 G7 (P410i) compatible drives
I have recently been looking to do an upgrade on my server recently by upgrading to using SSDs (2.5 inch). I have done a lot of late night googling and have found that many drives have an issue with ...
- 42
0
votes
1
answer
1k
views
fio numjobs & iodepth Values to Simulate Database PostgreSQL Workload?
I am trying to benchmark a ZFS RAID-10 array of SATA SSDs using fio with settings that are somewhat representative of database workloads like for PostgreSQL.
For example, for random reads:
fio --...
- 1,459
4
votes
1
answer
2k
views
Slow RAID performance for Samsung EVO's
So I've been suspecting performance bottlenecks on a Samsung EVO 850 RAID1 for sometime, but honestly been too lazy to look into it. Now I was starting a new home project, involving a Vmware ESXi host ...
- 51
74
votes
13
answers
48k
views
SSD or HDD for server
Issue
I have read many discussions about storage, and whether SSDs or classic HDDs are better. I am quite confused. HDDs are still quite preferred, but why?
Which is better for active storage? For ...
- 891
6
votes
1
answer
8k
views
Poor write performance of software RAID10 array of 8 SSD drives
I have server with Supermicro X10DRW-i motherboard and RAID10 array of 8 KINGSTON SKC400S SSDs; OS is CentOS 6
# cat /proc/mdstat
Personalities : [raid10] [raid1]
md2 : active raid10 sdj3[9](S) ...
0
votes
1
answer
194
views
SSD Raid perfomance
Disks: 10xSSD Ultrastar SS200 960GB 12GB/s Raid 0, 6, 10.
Controller: LSI Syncro 9380-8e
Filesystem: ext4 without LVM
System: Centos 7
2x E5620 @ 2.40GHz
32GB RAM
fio-2.1.10: --iodepth=32 --ioengine=...
- 89
2
votes
4
answers
4k
views
RAID 5 for SSD drives.
I am planning to deploy a cost efficient yet performant SAN/NAS setup for our main office. Use cases: storage for a 20-30 user VDI deployment, file server, primary backup location. Required usable ...
- 305
1
vote
2
answers
5k
views
SSD hardware RAID as local VMWARE datastore
i plan to buy a new ESXi VSphere Server with a LSI Megaraid Controller and 8 x Intel S3520 SSDs.
Hypervisor should be started from USB-Flashdrive
Hardware RAID10 containing 8 x Intel S3520 SSDs
...
- 11
-2
votes
2
answers
2k
views
Use SSD to buffer a storage Hard Drive [closed]
I have a specific storage server plan in mind. I want to use a SSD to buffer all data that I want written to a hard drive. The data would be written to the SSD, but copied to the HDD aswell. Kinda ...
- 105
1
vote
0
answers
38
views
Arrays removed by removing one disk?
I had an issue this weekend with a server at work, one of the Datastores (Raid1 2x300GB) on esxi filled up and the guest OS got suspended, we had nothing to attach an NFS to the esxi and all disk ...
- 13
-1
votes
4
answers
595
views
Moving to SSD storage from Platters: Where does RAID come in?
When moving to SSD, do you keep RAID10?
We have a server with internal SAS disks in a big array:
16x600GB RAID 10
This gives us ~4.6TB of storage. It is fast (this is SQL Server).
Our SQL ...
5
votes
2
answers
1k
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 ...
- 53
0
votes
1
answer
688
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 ...
- 1,858
0
votes
1
answer
71
views
What does fast small block random reads and writes do for enterprise SSD?
Since I don't have a background in hardware storages, I've read some articles to learn about the comparison between consumer and enterprise SSDs. I'm confused of what makes enterprise SSDs perform ...
LED Fantom
1
vote
1
answer
3k
views
Selecting an SSD to act as boot volume in an HP server
A question I recently asked regarding the use of enterprise 10k vs. 7.2k midline SAS disks led to some suggestions that the use of a mirrored pair of SSDs as a boot volume can make sense because:
...
- 1,852
9
votes
2
answers
4k
views
Are bcache and/or dm-cache considered stable for production in 2016?
I would like to use linux SSD caching (dm-cache or bcache) with Debian Jessie production servers. (kernel 3.16)
My question: Are dm-cache and bcache modules reliables in linux 3.16 ? Do I need to ...
- 93
2
votes
2
answers
3k
views
Does the max-80%-use target suggested for ZFS for performance reasons apply to SSD-backed pools?
The Solaris ZFS Best Practices Guide recommends keeping ZFS pool utilization below 80% for best performance:
Keep pool space under 80% utilization to maintain pool performance. Currently, pool ...
- 4,375
1
vote
0
answers
275
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 ...
- 363
-1
votes
4
answers
712
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 ...
- 147
1
vote
2
answers
904
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 ...
- 1,318
-3
votes
1
answer
209
views
Consumer vs Enterprise SSD [closed]
I'm deciding what SSD's to use in our infrastructure. Enterprise drives are obviously more reliable but storage items are expendable and will fail anyway. So considering that we have proper RAID, ...
- 1,299
-5
votes
1
answer
593
views
HP's $1,000 RAID Controller is outclassed by on-board raid? [closed]
HP's $1,000 Smart Array P822 controller is outclassed by an on-board raid controller. I'm having a hell of a time trying to figure this one out. My problem is that performance on the HP controller is ...
- 11
4
votes
3
answers
21k
views
What are the pros & cons of 4xSSD(512Gig) in a RAID10 vs. 2xSSD(1Tb) no RAID?
Lots of read and write operations that my current setup of 4xSAS15k drives in RAID10 is having made me think of a new fast storage.
My server is busy with a demanding database, lots of pages, php ...
- 145
17
votes
8
answers
13k
views
Understanding NVMe storage and hardware requirements
I'm a bit confused about the recent developments in PCIe-based storage, particularly as it relates to the NVMe specification and its hardware compatibility.
While I've worked extensively with SSDs in ...
- 197k
2
votes
3
answers
12k
views
Convert RAID from Mechanical Disks to SSD?
Any issues with converting a Mechanical Disk RAID to SSD by replacing the drives one-by-one?
I couldn't find anyone online who has done this, so let's make this the place to post about it.
If you ...
- 21
3
votes
4
answers
17k
views
What are the differences between consumer grade SSDs and the much more expensive enterprise SSDs?
I am in need of a terabyte or so of storage space for Lucene indices on a testing server. I'm having a hard time differentiating between disks like the Samsung 840 evo for about $450 vs SSDs with ...
- 155
1
vote
2
answers
3k
views
When reading SSD drive specs, what's the difference between MB/s and IOPS?
I'm trying to find a suitable SSD drive for my database server (postgres on debian 7 amd-64), and I find that for some SSD drives, while read speed is specified in MB/s, write speed is in IOPS. To ...
- 161
0
votes
0
answers
3k
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
0
votes
1
answer
203
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 ...
- 53
-1
votes
1
answer
81
views
Getting ssd, should i keep the ssd cache drive
We are going to install sdd's as main hdd in all of our pc's.
However, some of them already have an ssd drive that is beeing used as a cache drive.
Should be keep this chace ssd?
It was my though ...
- 101
15
votes
2
answers
27k
views
VMware ESXi SSD on RAID showing as non-ssd
I am replacing a KVM server with a ESXi server. I just installed ESXi 5.5u1 and added a data store. The new server has 4 SSD drives in RAID 6 using hardware RAID. When I added the data store VMware ...
- 1,505
1
vote
1
answer
4k
views
MacBooks are destroying SSDs
I'm opening this topic to find the cause of our SSD failure rate of +50%. We work with Mac (13" Macbook Pro & 13" Macbook Air), with installations of both Mac OSX Mountain Lion and Ubuntu. 90% of ...
- 197
4
votes
2
answers
9k
views
Database (MySQL) and SSD lifetime - "lot" of writes to DB
In company where I work we started using SSD for our internal 3 GB MySQL database
Difference in perfomance is HUGE, which is great.
What I am worried about is lifetime of SSD
Writes to DB are ...
- 167
15
votes
3
answers
6k
views
HP storage arrays - multiple channels?
Our SQL server is becoming pretty heavily loaded, and all indications point to the disk channel being the bottleneck. The current HP server has a fairly low-end array card, and we're looking to ...
- 1,147
28
votes
5
answers
10k
views
Do I need to RAID Fusion-io cards?
Can I run reliably with a single Fusion-io card installed in a server, or do I need to deploy two cards in a software RAID setup?
Fusion-io isn't very clear (almost misleading) on the topic when ...
- 197k
-5
votes
1
answer
84
views
Mix physical media for ESXi VM, or keep it all on one physical volume? [closed]
Say I have a 120GB SSD and a 2TB volume from a portion of a larger RAID6 array. I would like to spin up a Windows Server VM for purely low-impact personal use that employs a large data store in some ...
- 111
163
votes
5
answers
33k
views
Are SSD drives as reliable as mechanical drives (2013)?
SSD drives have been around for several years now. But the issue of reliability still comes up.
I guess this is a follow up from this question posted 4 years ago, and last updated in 2011. It's now ...
- 14.5k
-1
votes
1
answer
81
views
Fast storage for a server [closed]
I have created a search engine which is implemented in Java. I want to put this program to a server and test it. My program is very dependent to disk I/O and any improvements to disks would directly ...
1
vote
1
answer
307
views
Exchange and MS CRM on SSD's
I am looking at building a server for a friends business. This would probably be a SuperMicro job to come in on a small budget, 9 series with Sandy Bridge Dual Socket 2011 26xx processors.
I'm ...
- 600
5
votes
4
answers
48k
views
Pros and cons of installing ESXi on a SSD vs USB flash drive?
I'm debating on doing an ESXi 4.1/5.0 installation on a USB stick or a pair of 32GB SATA II SSDs (RAID1 mirror). According to VMWare's documentation, when ESXi is booting it looks for a 4GB space for ...
- 3,885
1
vote
1
answer
873
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 ...
- 161
5
votes
7
answers
3k
views
setup lowcost image storage server with 24x SSD array to get high IOPS?
I want to build let's name it a lowcost Ra*san which would host for our social site the images (many millions) we have 5 sizes of every photo with 3 KB, 7 KB, 15 KB, 25 KB and 80 KB per Image.
My ...
- 375
-1
votes
2
answers
144
views
Solid State Devices [closed]
Why is solid state devices not a good option to store data for a very dynamic (frequent updates) oracle database?
Although for read intensive databases ssd does give a huge performance improvement.
- 7
1
vote
1
answer
501
views
Windows Storage Server and SSDs in Raid 0 - Slow performance
We have a computer running Windows Storage Server 2008 R2 with 6 SSD in RAID 0.
This storage computer has one PCI-E with 4 Ethernet ports and we connected it to a gigabit switch to other computers ...
- 183
14
votes
4
answers
13k
views
Quick method to determine SSD drive health?
I have an Intel X-25M drive that was marked "failed" twice in a ZFS storage array, as noted here. However, after removing the drive, it seems to to mount, read and write in other computers (Mac, PC, ...
- 197k