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Questions tagged [ssd]

Solid-state drive refers to a data storage device that uses solid-state memory to store its persistent data.

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ZFS with L2ARC (SSD) slower for random seeks than without L2ARC

I am currently testing ZFS (Opensolaris 2009.06) in an older fileserver to evaluate its use for our needs. Our current setup is as follows: Dual core (2,4 GHz) with 4 GB RAM 3x SATA controller with 11 HDDs (250 GB) and one SSD (OCZ Vertex 2 100…
Florian Kruse
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Which FileSystem is best for CentOS 5 on SSD?

Background: We have gigs of data, which require to process large files simultaneously and in parallel with similar processes. We are going to get SSD just because of fastest latency. We will install CentOS 5 over it. Question: What is the best File…
Ahmed Memon
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How to overprovision an SSD for holding a smaller ZFS volume (ZVOL)?

I have a pair of 480 GB "Datacenter" SSDs (SAMSUNG MZ7LM480HMHQ-00005) that will make up a ZFS pool in a mirroring configuration. The pool's only content will be a ZFS volume (ZVOL) for a virtual machine. However, the ZVOL will only be 400 GB in…
David Scherfgen
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Unit for Total_LBAs_Written in SMART data

I have 3 machines with disks (actually, SSDs) in RAID1, purposely with different brands in an attempt to make it improbable to loose them both simultaneously due to wear-out. They are functional. They should have approximately the same number of…
fgrieu
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Server Hot Swap Hard Drives

We have a HP Proliant DL380 G9 server. We have a separate data drive which consists of 4 x 1TB 7.2k 6Gb hot-swappable SAS drives RAID 5'd to provide a 3GB logical drive. We've noticed the performance of the server is quite slow and after running…
David Colley
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SMART - Understanding Offline Data Collection

I have two Kingston A400 120GB SSD as cache in a Synology NAS, which don't seem to support automatic offline data collection. # smartctl -d sat -c /dev/sdc | grep -i "Auto Offline data collection" Auto Offline Data Collection: Disabled. No Auto…
Bangaio
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How to limit ZFS writes on NVME SSD in RAID1 to avoid rapid disk wear?

Currently I'm running Proxmox 5.3-7 on ZFS with few idling debian virtual machines. I'm using two SSDPE2MX450G7 NVME drives in RAID 1. After 245 days of running this setup the S.M.A.R.T values are terrible. SMART/Health Information (NVMe Log 0x02,…
Ahupathi R.
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HP Proliant DL360 G8 & G9 with SAMSUNG PM863a SSDs

Does anyone use Samsung PM863a SSDs in HP DL360 G8 & G9s - specifically in a Windows Server 2016 Storage Space Direct mirrored implementation ? What is your experience of this ? Having seen other posts about Proliants and 3rd party SSDs on these…
Steve
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Why is L2ARC not giving more speedup for directory traversal?

L2Arc is usually configured to cache random spinning platter reads on an SSD. I've set up this configuration in the hopes of speeding up directory traversal. This is the setup: # zpool list -v NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP…
Jos van den Oever
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Does any PCIe slot support NVMe SSD's automatically or do I need a specific M.2 slot?

I have been trying to dissect the information I find with googling, but have come to the conclusion that I cannot find with certainty the answer to the following questions: Given you know the basics of your own desktop system, how do I know it…
Abel
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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 wonder if it would benefit me. I'm running…
Jonny
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Acceptable I/O speeds for 6 x 250GB SSDs in RAID 10

I'm running CentOS 7 (XFS filesystem) on a dell server with a PERC H700 raid controller. Inside this server I have 6 x Samsung 850 Evo 250GB SSDs (yes they are consumer drives however, this is a home server. In any case, I performed a DD test and am…
FriendlyBystander
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SSD drives and RAID configurations vs LVM

Background: I'm familiar with the basic RAID levels, and am curious to know if using SSD devices in a RAID0 or RAID5 would be a better deployment than adding them to a large LVM volume. Specifically, I'm concerned about heat, sound, and power…
warren
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Samsung 850 EVO + HP P410 limited iops?

I´m experiencing a weird write iops limitation with a HP P410 256mb cache controller and 4x consumer grade ssd´s (Samsung EVO 850) in RAID5/10. After upgrade to latest firmware (6.64) for HP P410 controller, it continues with problems. Iostat…
Leo
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Adding SSD cache (PCIe) to existing Linux KVM Node with SATA disks

I currently have large KVM nodes utilizing between 8 & 16 RAID10 arrays & hardware raid. We typically provision a single large volume (VM's are backed up off site as well). KVM VM's using LVM volumes Currently, on our 16 disk arrays, we're getting…
Bjones
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