All Questions
Tagged with ssd software-raid
26
questions
-1
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0
answers
35
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Software Mirror RAID1 using NVMe SSDs - Hardware Considerations for Reliability and Durability [closed]
I am planning to use Windows Storage Spaces to create a 2-way mirror volume (i.e. Software RAID-1) out of 2 NVMe SSDs, with the most important factor being reliability and data redundancy (performance ...
- 105
0
votes
1
answer
47
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SSD Configuration choices for a 2-Way-Mirror Software RAID
I want data redundancy for my SSDs, and so would likely be using a software RAID like Windows Storage Spaces in a simple, fully-provisioned 2-way mirror configuration.
To minimize the risk of both ...
- 105
1
vote
1
answer
51
views
Replacing a single SSD in 4 disk mixed software RAID 1 & RAID10 system
I'm about to replace a single SSD in a 4 SSD RAID 1 & RAID10 system. My webhoster will only do the drive replacement, but not help with adding it back to the array after. I've not done this before,...
- 1,471
0
votes
0
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39
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SSD Software-Raid-0 Ubuntu not as fast as expected
I have an MB ASRock B650 Phantom with two SSD 1TB Samsung 990 PRO m.2 PCIe 4 drives. I set them up in a software Raid-0 with lukscrypt on Ubuntu. The SSD should reach 7.450 MB/s reading, in my naivety ...
- 101
1
vote
1
answer
264
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Erratic SMART readings on one member of a RAID 1 array
I am managing a server that uses 2 nvme ssds on RAID 1 connectivity.
At once point I lost access to one of the 2 and got my normal raid array degraded mails from mdadm.
So I asked from the hosting ...
- 11
0
votes
4
answers
2k
views
Raid 1 with 3 disks of different sizes
I'm new to this site.
I am currently configuring a server, which has these ssd disks:
1X1TB SSD NVme
2X512GB SSD NVMe
Now I would like to create a raid 1 between these disks, in which I would always ...
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) ...
7
votes
2
answers
11k
views
Hetzner's installimage script, RAID1 hard drives + SSD
I just purchased a server from Hetzner, with two 4TB hard drives and one 1TB SSD. I want to setup the two hard drives (/dev/sda & /dev/sdb) in RAID1 and install the OS on them, and have the SSD (/...
- 273
0
votes
0
answers
498
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Are SSD/HDD hybrid drives a good choice as drives in either BRTFS or md raid?
I'm currently planning to revamp a "computer". Using the term "computer" because I'm not sure what it's role exactly is...
It runs Ubuntu (17.10 / artful), it's being used as multi-seat desktop for ...
2
votes
0
answers
471
views
Transparent SSD-read-cache for unmodified HDD
I want to accelerate a 4TB HDD using a 100GB cache partition on an SSD on linux. I only need read-only-cache, so data corruption should not be a problem. I understand that bcache offers a relatively ...
- 29
2
votes
1
answer
859
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Linux software RAID becomes unresponsive after removing a disk from server
I am running a CentOS 7 machine (standard kernel: 3.10.0-327.36.3.el7.x86_64) with a software RAID-10 over 16x 1 TB SSDs (to be more precise, there are two RAID arrays on the disks; one of the arrays ...
- 155
1
vote
0
answers
557
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mdadm scaling beyond 6 disks w/ ssd's
It seems Linux mdadm produces less writes & iops as more disks are added to an array. For example, I have tested the following configurations, with the defaults aside from changing the I/O ...
- 11
1
vote
0
answers
181
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Does mdstat showing very different block sizes for identical drives indicate a failing drive?
One of my servers has a RAID1 array composed of two 240GB SSDs. It is managed/controlled via Linux, not via a hardware card.
Recently, for no apparent reason, the array needed rebuilding. I rebooted ...
- 2,475
6
votes
1
answer
5k
views
How is LSI FastPath different from Software RAID?
This question pertains to SSDs on RAID levels without parity (like RAID 0, 1, 10).
The recommended settings for FastPath are to set the Write Policy to Write Through, Read Policy to No Read Ahead and ...
- 422
4
votes
0
answers
4k
views
Tuning mdadm RAID 5 performance?
I have a system with dual Intel E5-2620 v3 @ 2.40GHz, 64 GB ram, an LSI 3008 HBA, 8x 1.6 TB Intel S3510 SSDs. I've been playing benchmarking it in different configurations using fio and I've gotten ...
- 367
0
votes
1
answer
2k
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What are the Pros & Cons of Software RAID vs Hardware RAID of 4xSSD(512Gig) in RAID10?
I'm getting this server: Supermicro SuperServer 6018R-TDW
It comes with this motherboard: Supermicro X10DDW-i
I've decided going with 4xSSD(512Gb) in a RAID10.
My server is busy with a demanding ...
- 145
4
votes
3
answers
6k
views
Is there a way to force a TRIM in a Windows 2012 Software RAID array?
I have a Windows 2012 server configured with two SSD under a Software RAID 1 (controlled by Windows), under that configuration the optimization tool is not supported.
Is the TRIM still scheduled/...
- 265
6
votes
5
answers
4k
views
SW SSD Raid 1 over HW RAID 10
A provider(data center) recommended I go with 1TB SSDs in a software RAID 1 over HW RAID 10 with mechanical drives.
Their quote:
Typically SSDs are most reliable than RAID cards and since you have
...
- 3,931
2
votes
1
answer
895
views
Various problems with software raid1 array built with Samsung 840 Pro SSDs
I am bringing to ServerFault a problem that is tormenting me for 6+ months. I have a CentOS 6 (64bit) server with an md software raid-1 array with 2 x Samsung 840 Pro SSDs (512GB).
Problems:
Serious ...
- 105
0
votes
1
answer
1k
views
How to increase disk write-speed for SSD RAID10 array?
I've had no luck searching how to setup writeback cache on a RAID10 setup using mdadm software RAID. I'm trying to set this up for a 4x256Gb Samsung 830 SSD setup which only has 400Mb/s write speed... ...
- 337
4
votes
1
answer
850
views
Performance of Linux software raid-1 across SSD and HDD (partitions)
How does Linux software raid-1 work across disks of dissimilar performance.
Would a raid-1 across ssd and hdd partitions give me a mirror of the ssd contents while not impacting the read speed? I ...
- 2,068
16
votes
1
answer
15k
views
Implementing Linux fstrim on SSD with software md-raid
I'm currently building a new Ubuntu 13.04 server with 2 256GB SSDs in a raid mirror to run a MariaDB instance. We typically place LVM on top of dm-crypt encryption on top of an md raid 1 array, but ...
- 5,640
7
votes
3
answers
11k
views
What would happen if I did a raid on a SSD and an HDD?
I am building another server (cheap) and would like to go with a 256GB SSD drive for my boot and data. This will be enough for my needs, but just having one SSD scares me for a couple of reasons.
If ...
- 3,247
0
votes
1
answer
499
views
Server Config Software Raid Slow Read
I have 6x WD Caviar Black 1,5 TB in Software RAID 10 / 1 / 0 (Centos 6.2 / mdadm)
cat /proc/mdstat
Personalities : [raid10] [raid0] [raid1]
md0 : active raid1 sdf2[5] sda2[0] sdb2[1] sdd2[3] sdc2[2] ...
- 125
8
votes
1
answer
5k
views
Can I use dmraid instead of md (mdadm) to make software RAID-1 and RAID-1+0 volumes?
On a related question about SSDs and TRIM (see: Possible to get SSD TRIM (discard) working on ext4 + LVM + software RAID in Linux? ), it turns out that dmraid may now (or shortly) support TRIM on RAID-...
- 1,808
7
votes
4
answers
5k
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Do any software RAID solutions support the TRIM command?
This is a broad question -- I'm not asking about a particular RAID level or OS.
- 225