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

learn more… | top users | synonyms

4
votes
2answers
1k views

Can I use an SSD as Cache to a NAS?

There is a NAS with Raid 10 that holds resources. At a time, around 24 machines try to access the same resource (3d rendering in a render farm). Although the network is 1Gbps and NAS is fast, the ...
4
votes
2answers
2k views

3rd party SSD drive in HP Proliant server only shows 3G transfer speed

After receiving some excellent advice in a previous question, we've bought a OWC Mercury Extreme Pro drive for use in our HP Proliant DL360 G7 server. Both the drive, and the P410i array controller, ...
4
votes
3answers
8k 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 ...
4
votes
2answers
919 views

Does it makes sense to run “optimize table” when the mysql database is stored on SSD?

The manual says about "optimize table": "Deleted rows are maintained in a linked list and subsequent INSERT operations reuse old row positions. You can use OPTIMIZE TABLE to reclaim the ...
4
votes
2answers
399 views

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 ...
4
votes
1answer
259 views

Dell 2950 - Can I mix SSD with spindle HDDs?

I have a Dell 2950 with a Perc 5/i controller inside it. I don't want to spark a debate about drive types and which is "better" etc etc. Just simply; I would like to put in 2x Cheetah 15.5k SAS ...
4
votes
2answers
2k views

What is the best Solid State File System (SSDFS) for Linux?

EXT4 is not a solid state file system. It won't take full advantage of the hardware and it will ware out the drive. So what is the best Solid State File System for Linux? I am looking forward to ...
4
votes
5answers
1k views

SSDs as Linux swap for large virtual mem applications?

This question topically touched on this, but running on 64-bit Linux, I have a set of data caching JVMs as well as wanting a large web cache. Each cache today is configured to in gross fit in system ...
4
votes
1answer
118 views

RAID Mirror with difference HD types

Can a SSD and a non SSD be setup in a Mirrored raid configuration (non software)?
4
votes
1answer
3k views

Why does storage's performance change at various queue depths?

I'm in the market for a storage upgrade for our servers. I'm looking at benchmarks of various PCIe SSD devices and in comparisons I see that IOPS change at various queue depths. How can that be and ...
4
votes
1answer
841 views

How to update SSD Firmware on RAID Controllers

Got some servers with RAID Controllers and SSD. Raid Controller: LSI MegaRaid 9271-4i SSD: Intel 520 The MegaRaid controllers have the ability to update drive firmware using MegaCLI. Intel for ...
4
votes
4answers
3k views

Linux tool to reset Intel X25 SSDs wear leveling tables?

I'm aware of the DOS utility to "Reset" an Intel SSD to factory settings, but I'd rather not shut down my system to do this to my SSDs. Supposedly newer kernels support TRIM, but I haven't found any ...
4
votes
4answers
782 views

How to split XP to a SSD and regular spinning storage

Looking for instructions on how to install XP on a SSD drive so that pretty much only the core stuff (DLLs system exes) are on the SSD drive. Most drivers are loaded once into memory essentially at ...
4
votes
1answer
190 views

Media_Wearout_Indicator at 043 - Reason to be worried?

I have a server running with two SSD disks in RAID1 and both drives report a Media_Wearout_Indicator at 043 from smartctl. 233 Media_Wearout_Indicator 0x0032 043 043 000 Old_age Always ...
4
votes
2answers
992 views

Maintenance (TRIM) of SSDs in HW RAIDs

I have 2 ARECA 8040 HW-RAIDs, with 8 SSDs each. One is RAID10 with Intel 520 SSDs, the second is RAID5 with Samsung 840 SSDs. Both are connected to the Server with one shared LSI Logic / Symbios Logic ...
4
votes
3answers
650 views

Vertex 2 SSD Freezing 60 seconds at a time

I have a OCZ Vertex 2 SSD that I've been using for a few years in a Win2k8 64-bit "Server" (Dell Precision M4300). Every few weeks it gets in a mood during which it temporarily freezes very often for ...
4
votes
1answer
4k views

How to over-provision an Intel SSD RAID Array via the Dell H700 PERC RAID Controller

I would like to set up a RAID10 array of 6 Intel SSD 320 SSDs, but over-provision them to enhance their performance and duration as per this PDF: ...
4
votes
1answer
290 views

Does AIX support Advanced Format (4k sector size) SAN LUNs?

I am working with an EMC XtremIO storage array that utilizes SSD devices that use a native 4 KB sector size instead of the traditional 512 B size. I am attaching an IBM AIX 7.1 server to the array. I ...
4
votes
1answer
104 views

Is it sensible to use SLC swap as a RAM substitute on a VM host?

I have a few oldish servers running virtual machines but they are limited to 16GB RAM and that limits the number of VMs I can run and the options for RDS. I've added a RAID1 array of two Intel 311s: ...
4
votes
1answer
345 views

Sync SSD to spindle drive using RAID or DRBD

I'm setting up a server with and SSD as the primary drive, and would like to duplicate the data onto a cheaper drive as a block-level backup (à la RAID1). Since I don't want to hobble the performance ...
4
votes
1answer
112 views

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 ...
4
votes
1answer
593 views

Is TRIM passed through a LVM-based PV Xen domU to the underlying SSD

Scenario: -- Debian Xen dom0 -- SSD drive setup as LVM PV/single Volume Group. -- Debian pv_ops-based domU setup on LVM logical volume. -- File system inside domU is ext4 with discard option enabled. ...
3
votes
4answers
6k views

HP D2700 enclosure and SSDs. Will any SSD work?

I've got an HP D2700 enclosure that I'm looking to shove some 2.5" SSD drives in. Looking at the prices of HP's SSD drives vs something like an Intel 710 and even something less 'enterprisey', there's ...
3
votes
2answers
289 views

Age replacement policy for hard disks and SSDs at servers

I'm planing an age replacement policy for our storage and servers. Most of them are for DBs and some for images (static content) so yes, they have an huge I/O everytime. Also, we use Samsung 840 Pro ...
3
votes
3answers
3k 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
votes
4answers
4k views

SSD + Hard Disk RAID-0 Efficiency?

Recently I bought a PC that came with a 64GB SSD along with a 300GB 7200 RPM hard disk drive. I thought that they would use the 64GB SSD to install the OS with the HDD acting as a data drive. I was ...
3
votes
3answers
625 views

Using SSD drives in a raid in an operation involving little to no deletes

From what I've been able to understand when reading about the case with Solid State drives and raids, the problem is that TRIM cannot be used for them in a raid configuration, thus, resulting in the ...
3
votes
4answers
4k views

SSD (Raid 1) vs SAS (Raid 10) Sql Server Hardware Recommendation?

Our current SQL Server Machine (which is about 6 years old): Box: Dell 2900 CPU: Xeon 5160 Dual Core RAM: 4GB HDD: 6x 15k RPM SAS drives in raid 10 Since it's 6 years old, the drives have been ...
3
votes
2answers
2k views

ZFS: best practices for adding cache to pools

sounds like dumb question but there are no ready answers at SF can the cache pool have different name than the zpool? eg: suppose there is a zpool "tank" serving NFS and iSCSI can a new cache pool ...
3
votes
6answers
522 views

For a new database server, which partition will benefit the most from SSDs?

I'm speccing a new database server for a Microsoft SQL Server environment. In the past, I would create four separate RAID arrays for OS, data, transaction logs, and tempdb. Now, I am looking at the ...
3
votes
3answers
872 views

Recommended 256 GB SSD for Linux servers

I need some relatively-affordable 256 GB SSD drives for a Linux application where fast seek performance (many IOPS) is more important than sequential throughput. The ratio of reads to writes is more ...
3
votes
4answers
784 views

Recommended SSD Setup

I'm building a new server which will be running a text search service for our online web services. This service requires fast IO so I am trying to further reduce any potential bottlenecks. I would ...
3
votes
2answers
492 views

Is it safe to place write-intensive partitions on an SSD (in an SSD+HDD system)?

I'm setting up a (sort of) powerful workstation for SW development work on Linux. It's a Xeon system with multiple cores, 32GB memory, a large HDD and a 120 GB SSD (Samsung MZ7WD120HAFV a.k.a. ...
3
votes
1answer
6k views

Server responds “bus error” to every command

I have a linux machine dedicated to MySQL server with a pretty high load. Today I woke up and was terrified to see that database server is down. I could connect to it via SSH, but it was responding ...
3
votes
3answers
4k views

HP P410 RAID + Samsung 830 SSDs + Debian 6.0 - What performance to expect?

I'm renting two dedicated servers from a hosting company. Here are the specs: server1: HP ProLiant DL165 G7 2x AMD Opteron 6164 HE 12-Core 40 GB RAM HP Smart Array P410 RAID controller 2x Samsung 830 ...
3
votes
2answers
5k views

ext4 filesystem corruption — maybe hardware error?

I'm getting these errors in dmesg after about half an hour after I turn on the computer: [ 1355.677957] EXT4-fs error (device sda2): htree_dirblock_to_tree: inode #1318420: (comm updatedb.mlocat) ...
3
votes
3answers
2k views

SSD + LUKS performance comparison?

Our laptops and portable drives must be LUKS encrypted. LUKS doesn't really seem to cause much performance loss on normal laptop hard drives (7200RPM) for us. With the crazy data rates you get with ...
3
votes
2answers
2k views

Why would anyone want to put DB log on a SSD?

I keep hearing about people who want to get SSD for their databases. But instead of putting their tables on SSD, quite often people want to put their DB log on SSD while leaving their tables on ...
3
votes
1answer
2k views

How do physical disks passed through ESXi perform vs. passing through HBAs?

Context: I have a SAN operating system (Nexenta) that runs on ESXi. It has a couple of HBAs passed through to it already, via VT-d. All of the HBAs for the SAN OS are full (no free connectors). I ...
3
votes
4answers
2k views

Does an SSD in a file server on a gigabit LAN result in noticeably faster file access for end users compared to HDD?

I've read a lot (and experienced) the benefits (fast boot times, quick program launching, quick file access, etc) of using an SSD as the boot drive on a workstation, but haven't been able to find much ...
3
votes
4answers
989 views

How can I make this setup faster?

Hey StackOverlow Community, I currently am using some software that stores a bunch of XML files. All the files are under 25k bytes. The makers of the software state the performance is based on ...
3
votes
2answers
2k views

Advices for filesystem choice and tuning on SSD?

What is your favourite filesystem on SSD disks, and why? I'm asking because on my Acer Aspire One with 8 GB SSD with ReiserFS it takes ages to boot after an unclean shutdown, so I'm probably missing ...
3
votes
2answers
112 views

Is it a good idea to use two different SSDs in RAID1? (to avoid both drives failing at the same time because of some manufacturing bug)

I'm building a new server here at university and I suggested that we use two different SSDs in RAID 1 (mirror) to avoid both drives failing at the same time because of some inherent manufacturing ...
3
votes
1answer
144 views

HP Proliant G6 reporting failed SSD drive - alternative strategies for monitoring?

I would like to get your feedback about a controversial situation I found myself in some days ago. I was tasked to use a HP Proliant G6 for development purposes with 2 new (< 2 months, never used ...
3
votes
1answer
491 views

Setting I/O scheduler for SSD based RAID array on EC2 instances

I created a RAID array using the 2 local SSD drives on a EC2 c3.4xlarge instance. # mdadm --create /dev/md127 --level=0 --raid-devices=2 /dev/xvdf /dev/xvdg # mkfs.ext4 /dev/md127 # mkdir /data # ...
3
votes
1answer
765 views

NexentaStor: how to partition SSD disk?

I'm trying to set up some homegrown storage using a desktop motherboard, 4 x SATA drives and 2 x SSD drives. I'd really like to use NexentaStor for its nice web interface and for it is some ...
3
votes
1answer
1k 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 ...
3
votes
3answers
464 views

The use of external journals on SSDs

Certain journaled file-systems do suffer from performance penalties for hosting the journal on the same drive as the filesystem itself. Using an external journal can improve write speeds. With the ...
3
votes
1answer
2k views

Trim support in Hardware RAID (Perc H700)

We are about to order a dell R610 with a H700. We were thinking of using 2 X Samsung 850 Pro 512Gb drives in RAID 1. The question is does the Perc H700 support TRIM in hardware RAID 1? The answers I ...
3
votes
2answers
532 views

LVM with SSD + non SSD in volume group (for snapshot storage)

I have a KVM box running some critical VMs which perform software builds. The server runs SSD drives. I have an older version of KVM which has limited snapshot capability, and I have decided to use ...