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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162
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5answers
32k 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 ...
73
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13answers
30k 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 ...
59
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8answers
13k views

Does bigger capacity SSD have longer life due to wear leveling?

I have been told that you can get a longer lifespan of an SSD if you buy a bigger capacity SSD. The reasoning goes that newer SSDs have wear leveling and thus should sustain the same amount of writing ...
54
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4answers
48k views

What is the current state (2016) of SSDs in RAID?

There are plenty of resources available online that discuss using SSD drives in RAID configurations - however these mostly date back a few years, and the SSD ecosystem is very fast-moving - right as ...
41
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5answers
34k views

Measuring 'total bytes written' under Linux

We're quite interested in exploring the possibility of using SSD drives in a server environment. However, one thing that we need to establish is expected drive longevity. According to this article ...
37
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2answers
7k views

What risks are there with mixing SSD models in RAID?

Aside from one type of disk bottlenecking the other, are there any other problems with mixing SSD models in RAID? My problem is, I need to upgrade the storage in a server with 4x Samsung 845DC EVO ...
36
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5answers
24k views

Mean Time Between Failures — SSD

The Mean Time Between Failures, or MTBF, for this SSD is listed as 1,500,000 hours. That is a lot of hours. 1,500,000 hours is roughly 170 years. Since the invention of this particular SSD is post-...
34
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7answers
64k views

Should I RAID my SSDs?

I have a couple of SATA hard disks RAIDed for safety in my machine, because I'm worried about the drive having some sort of mechanical failure and losing my data. I'm considering switching to an SSD ...
32
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9answers
23k views

Reliability of ssd drives

The main advantage of SSD drives is better performance. I am interested in their reliability. Are SSD drives more reliable then normal hard drives? Some people say they must be because they have no ...
30
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5answers
42k views

Do SSDs support SMART?

S.M.A.R.T. (for Self-Monitoring Analysis and Reporting Technology) is a wonderful technology to detect hard drive failure before it really happens. But is S.M.A.R.T. relevant for SSDs?
29
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3answers
31k views

EBS vs SSD definition

I am confused about the EBS and SSD choice while creating an instance . while choosing instance parameters (Step 2) you will see 2 options in the column Instance Storage (GB) : EBS only or SSD . ...
28
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5answers
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 ...
28
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8answers
10k views

Consumer (or prosumer) SSD's vs. fast HDD in a server environment

What are the pro's and con's of consumer SSDs vs. fast 10-15k spinning drives in a server environment? We cannot use enterprise SSDs in our case as they are prohibitively expensive. Here's some notes ...
26
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11answers
63k views

Should you disable the page file with SSD?

I've been reading this question, and it has a lot of great information. But assuming you have more than enough RAM, I think the page file should be disabled on SSD to extend the life time. I know you ...
26
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7answers
60k views

Third-party SSD solutions in ProLiant Gen8 servers

I was wondering if anyone had any specific experience using Intel DC3700 SSDs (or similar) in the HP (DL380p) Gen8 servers? I'm upgrading a set of database servers that use direct-attached storage. ...
25
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2answers
30k views

For L2ARC and ZIL: is it better to have one large SSD for both, or two smaller SSDs?

Main references ZFS L2ARC (Brendan Gregg) (2008-07-22) and ZFS and the Hybrid Storage Concept (Anatol Studler's Blog) (2008-11-11) include the following diagram: Question Should I interpret the ...
25
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6answers
4k views

Scaling databases with cheap SSD hard drives

I hope that many of you are working with high traffic database-driven websites, and chances are that your main scalability issues are in the database. I noticed a couple of things lately: Most large ...
25
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3answers
10k views

Reliability of SSD vs HDD (Over large temperature variations)

I've got an application which requires data recording in a outdoor environment, and I am interested in the reliability of SSDs vs HDD when placed in a cold (down to -20) and hot (+50) ambient ...
23
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5answers
6k views

SSD head / cylinder / cluster details

A customer of ours makes industrial robots that run on very old, but stable, hardware and software. The only bottleneck has always been the hard drive in these moving machines. Due to constant ...
22
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4answers
71k views

Would SSD drives benefit from a non-default allocation unit size?

The default allocation unit size recommended when formatting a drive in our current set-up is 4096 bytes. I understand the basics of the pros and cons of larger and smaller sizes (performance boost vs....
21
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6answers
13k views

Verify TRIM support with BtrFS on SSD

We are looking into using BtrFS on an array of SSD disks and I have been asked to verify that BtrFS does in fact perform TRIM operations upon deleting a file. So far I have been unable to verify that ...
20
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4answers
13k views

Does a RAID controller with an NV cache improve the performance or integrity of an SSD array?

I am planning to purchase a server (Dell PowerEdge R740) with SSDs in RAID 10, and my priorities are write performance and data integrity. It will be running Linux. The SSDs have write caches with ...
20
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6answers
14k views

Possible to get SSD TRIM (discard) working on ext4 + LVM + software RAID in Linux?

We use RAID1+0 with md on Linux (currently 2.6.37) to create an md device, then use LVM to provide volume management on top of the device, and then use ext4 as our filesystem on the LVM volume groups. ...
18
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10answers
24k views

Zeroing SSD drives

We host VPSes for customers. Each customer VPS is given an LVM LV on a standard spindle hard disk. If the customer were to leave, we zero out this LV ensuring that their data does not leak over to ...
18
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3answers
62k views

What are the main points to avoid RAID5 with SSD?

My understanding is that an SSD has a limited amount of writes. RAID5 performs many writes due to parity information across the drives. So reasoning states that RAID5 would kill and lower the ...
17
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3answers
12k views

Is there a way to protect SSD from corruption due to power loss?

We have a group of consumer terminals that have Linux, a local web server, and PostgreSQL installed. We are getting field reports of machines with problems and upon investigation it seems as if there ...
17
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4answers
11k views

Hardware RAID Controller Support for SSD TRIM

Do any hardware RAID controllers available today support TRIM? If not, do any manufacturers have target dates for supporting TRIM? Should I even care about TRIM for SSDs installed in performance-...
17
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8answers
12k 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 ...
16
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4answers
4k views

Wipe is very slow. Too little entropy?

I have to hand off a Laptop including its hard disc. Since it was not encrypted I wanted to wipe it at least quickly. I know this is not optimal on SSD, but I thought better than just plain readable. ...
16
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2answers
11k views

Linux SSD as HDD cache

I have a Linux server system installed on an SSD and an HDD for user data. As there is space left on the SSD, I want to use it as a read cache for the HDD. Looking at the possibilities, I found: dm-...
15
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4answers
16k views

Should I avoid putting two SSDs in a RAID1 configuration due to performance degradation?

I have a workstation system that will have two 64GB industrial SSDs, and the plan is to have both disks in a RAID1 configuration for redundancy which is set up in the kickstart. The system will be ...
15
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2answers
19k views

SSD, Erase Block Size & LVM: PV on raw device, Alignment

I want to install a new SSD and use the the whole device as a PV for LVM - in other words: i don't plan to put even one partition on this device. So aligning partitions on the erase blocks is not ...
15
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1answer
14k 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 ...
15
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3answers
19k views

Force renegotiation of PCI Express link speed? x2 card reverts to x1 width

In an effort to circumvent compatibility and cost barriers to using SSD drives with newer HP ProLiant Gen8 servers, I'm working to validate PCIe-based SSDs on the platform. I've been experimenting ...
15
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1answer
9k views

Why is this SSD drive failing with bad sectors, and was it predictable?

Note: this question was previously closed as off-topic. You can read the discussion. My reasons for asking it here are: This drive is in an offline content cache server for schools in rural Zambia. ...
14
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3answers
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 ...
14
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2answers
23k 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 ...
13
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6answers
20k views

How do I effectively destroy a SSD? [duplicate]

What is a repeatable way of destroying SSDs? For example, if i opened it which part could i take out and destroy for just the data(How to identify the actual "storage unit")? Case 1. Normal user that ...
13
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9answers
7k views

Is using 2 solid state drives in RAID 0 going to be reliable?

I am thinking of upgrading from a Western Digital 10k RPM hard drive to using two Intel-X25 solid state drives in RAID 0 configuration. I will be using this for hosting the operating system and ...
13
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9answers
21k views

Home-brew automatic tiered storage solutions with Linux? (Memory -> SSD -> HDD -> remote storage)

Related to this question about using an SSD for system and HDD for data, except I would like my system to do this automatically... Is it possible to have several layers of storage and push items ...
13
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4answers
19k views

How to measure total writes performed to SSD in Linux?

I've searched the internet to find a tool/utility which can tell me the total writes performed to an SSD (or a normal disk). The output should look something like this: SSD Intel 320S :- Total data ...
13
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4answers
12k 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, ...
13
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2answers
777 views

Enable Discards HP 3PAR StoreServ 7400

Spin off from these previously asked questions How to get free space from mounted drive Redhat 7 Update crypttab asks for Passphrase for fstrim We have a HP 3PAR StoreServ 7400 with 170 VM's ...
13
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2answers
3k views

Is post-sudden-power-loss filesystem corruption on an SSD drive's ext3 partition “expected behavior”?

My company makes an embedded Debian Linux device that boots from an ext3 partition on an internal SSD drive. Because the device is an embedded "black box", it is usually shut down the rude way, by ...
12
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3answers
3k views

Potential pitfalls associated with securely deleting SSD disks

I need to decommission two SSD disks from one of my Linux hosted servers. In order to safely delete data stored in the disks I was planning to use: hdparm --security-erase. I read this document and ...
12
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7answers
6k views

Does it make sense to install SSDs on server?

I want to build a server hosting about 2TB+ data. Of course SSD is out of the picture in terms of the data drive. My question is: Is there any benefit to use SSDs as the boot drive? I plan to put 16G ...
12
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1answer
350 views

Running SQL from memory faster than SSD?

Recently we have been having problems with our oracle database locking up on 1 query that we know so far. I will give a break down of what is happen however really doesn't have too much to do with my ...
12
votes
1answer
305 views

ssd firmware, linux: updating large batch of drives

I was recently hit with a fatal firmware bug that affected dozens of Crucial SSDs deployed in my datacenter. Many of the affected machines use LSI or other proprietary SAS controllers, which Crucial's ...
11
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6answers
11k views

SSD for swap on Ubuntu server

Currently I am reading SSD reviews and I wonder how much exactly I will benefit if I move the 24 GB swap from 7200rpm HDD to SSD. Does anyone implemented swap space on SSD? Is this generally good idea?...
11
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2answers
8k views

SSD (Intel 530) read/write speed very slow with RAID 10

Explanation: We have a Server: Model: HP ProLiant DL160 G6 4 x 240GB SSD (RAID-10) 72GB DDR3 RAM 2 x L5639 HP P410 RAID Controller (256MB, V6.40, Rom version: 8.40.41.00) SSD drives are 4 brand new ...

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