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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SSD and MegaRAID 9271 today?

I happened to get new server that equipped with LSI 9271-4i RAID card with BBU and 1 Gb of onboard cache, and two SSDs in mirror on it. Surprise for me, this well know RAID card have no firmware ...
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Cache SSD shutdown data loss

Most SSD have a cache to provide fast write speed. But what happens when I shutdown the computer with full cache? Is that cache volatile? How fast ist the cache processed and persisted? Do I need to ...
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Swapping out a HP H240 host bus adapter to a P420?

Does anyone know if it is possible to keep the current raid configuration if swapping from the H240? It's currently running raid1+0 with 4xSSD's and I've noticed the poor write performance compared ...
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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 ...
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46 views

Support on 3rd party SSDs for Lenovo ThinkSystems

I was wondering if there are any problems on using third-party NVMe-SSDs (e.g. Samsung 970) in a Lenovo ThinkSystem?
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add M.2 NVMe enablement kit to HP DL360gen9

I have a HP DL360gen9 8sff Applications running on the machine are saturating the current disks, all Intel Enterprise SSD disks. I would like to add M.2 NVMe drives but I can't figure out which ...
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smartctl reports CurrentPendingSector by mail every ~2 hours, but counter remains 0

I have smartmon tools installed on my ubuntu desktop computer that has a few disks. Since a few weeks it sends me a mail every 2 hours on average reporting CurrentPendingSector on my SSD disk (/dev/...
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28 views

What is the difference between Consumer and Client SSD? [closed]

Does anyone know what are the differences between Consumer and Client SSD : https://www.samsung.com/us/computing/memory-storage/solid-state-drives/ssd-970-pro-nvme-m2-1tb-mz-v7p1t0bw/ versus https://...
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Extremely Poor RAID Array Performance

I have a HP DL20 G10 with the Xeon 2134 CPU. This server is configured with 3x CT960BX500SSD1 1TB Solid State Drives in RAID 5 on the S100i software raid controller (Windows Server Essentials 2019). ...
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Linus/ext4/nvme crashes during high io

During mvn compilation, I have random crashes. The problem seems related to high IO and in kern.log, I can see things like: kernel: [158430.895045] nvme nvme1: controller is down; will reset: CSTS=...
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What is the performance effect of distributing data on multiple SSD disks?

I have a quite busy web server ruining on Linux. The whole filesystem is on a SSD which is half full. I'm wondering if I move /www containing the web data to a fresh SSD of the same type, what will ...
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How do I know if SSD is the bottleneck in Linux?

I have a database server which uses a Samsung 840 pro disk. The load is constantly higher than usual, even if there is not much activity on the website. So I suspect the disk has worn out. But how can ...
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1answer
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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 --...
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142 views

Can't resize ext4 partition

I have an 500GB HDD disk (480GB free) that I need to clone it to an SSD 240GB. I have read that cloning the HDD to the SSD should work for NTFS filesystems. But it isn't working for the ext partition....
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/dev/mapper/vg-root is eating all my hdd space [duplicate]

# df -h Filesystem Size Used Avail Use% Mounted on devtmpfs 16G 0 16G 0% /dev tmpfs 16G 0 16G 0% /dev/shm tmpfs 16G 202M 16G ...
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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 ...
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Hp ssd p420i iops

i am creating an linux(centos7) nfs ssd datastore for vmwware esxi. i am using an HP dl360e with p420i(1GB cache) and 6 x ssdsc2ba200g3p 200GB ssd 6g drivers(HP part number 730053-B21). Using fio i ...
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1answer
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Flash firmware on a Micron OEM SSD (P400m)

I have a 100 GB Micron P400m SSD from an EMC VMAX array. The sector size is 520 or 528 bits. I can identify the drive with everything via the tools from Micron, but it refuses to download the firmware ...
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1answer
460 views

Ceph hardware sizing calculator

I would like to calculate the Hardware sizing for a ceph cluster. There are so few references to the sizing, that I try to get these details here in the community. E.g. what shall i have depending on ...
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34 views

Ceph with mainstream (desktop) SSDs?

I am searching for an answer about using SSDs drivers, which are build for the mainstream. Afaik ceph uses for its marketing to buy cheap disks for entprise ready storages. But I cannot find any ...
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Why is a full OS install needed for an iSCSI target?

I am researching how one might go about making PCIe SSDs accessible as an iSCSI target for a very small 2-3 server network, and using off the shelf DIY components. A mystery I am trying to answer is ...
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How does Azure handle TEMPDB on the local SSD when using WSFC to support an always on availability group?

How does Azure handle TEMPDB on the local SSD (drive D:) when using WSFC to support an always on availability group? I know that the local SSD, where it's recommended to place TEMPDB, is erased ...
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1answer
50 views

SDA Input / Output error when trying to install OS

We are getting error tryint to zero out data on /dev/sda, see quote below, is there anything that might cause this or any tip on how we could fix this issue? The disk was working perfectly but a ...
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1answer
63 views

How to derive bytes written from SMART's host_write_commands?

Using either smartctl 7.0 or nvme 1.7, I get the following data from the SMART log data_units_written : 350,371,149 host_write_commands : 2,974,115,785 Via smartctl, ...
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Can we upgrade Dell's basic Server R240 (which still uses HDD 7200RPM) to an SSD?

Today I was shopping for the most basic dell rack server which is the R240. Ironically, they are still using HDD 7200 RPM, with no option for SSD in their selection; and we're approaching 2020! ...
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1answer
40 views

Limitations to using many SSDs in computing server [closed]

This is a beginner's question: We have a powerful computing server for roughly 10 users which will be increasingly used for data processing. In the past the main bottleneck was I/O. I was wondering ...
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1answer
354 views

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. ...
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1answer
86 views

OCZ Revodrive 350 srs interrupts

We built some servers running Windows Server 2016 out of some "spare" parts with the following specs: Supermicro X10DRH-iT Dual E5-2620 v3 256GB Registered ECC DDR4 RAM 1x Adaptec 71685 RAID ...
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1answer
47 views

Servers with 24 NVMe drives - read throughput [duplicate]

We would like to buy some servers and we are looking into DELL server with 24 NVMe drives (like R740xd2 - 2 socket server) since we need very high read IOPS and throughput. We are however wondering ...
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2answers
491 views

DELL PERC H730 RAID Performance Problems

I purchased a Dell EMC R740 with 8 Intel S3520 SATA 6 Gbps SSD drives. The problem I have is that no matter what RAID configuration I select I seem to be limited to roughly 5 Gbps. I would think ...
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1answer
230 views

6 Samsung 860 EVO SSDs running RAID-10 with an LSI-9260 controller TBW

I am getting ready to implement a RAID-10 config with 6 Samsung 860 EVO 500gb SSDs. They will be attached to an LSI 9260-8i controller. The specs for the SSDs lifespan read 300TBW. Q1 - Can ...
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How can I make a low-level image an NVMe drive?

I have an Intel NVMe (U.2) drive attached to my computer. TL;DR: How can I create a low-level image of an NVMe SSD (an Intel SSD 750) that includes all data on the drive, including the contents of ...
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2answers
310 views

Is swap compression in RAM (ZSWAP) benefitial on a Linux server with SSD drives?

I am trying to improve performance (responsivity) of a webserver during rare events of high memory utilization (90%...) where it starts to swap a lot, in order to help manual intervening faster and ...
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13answers
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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 ...
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1answer
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How can I verify my vserver provider offers SSD as promised?

For this month I have rented two vServer, each from a different provider. Both indicated that the disks of the system use SSD technology (making me expect a bandwidth of at least 300MB/s and maybe ...
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1answer
608 views

With a 500GB SSD and a 250GB SSD is it possible to mirror a 250GB partition on the 500GB with the 250GB SSD using ZFS?

So I have a Samsung 250GB 850 Evo SSD and a 500GB 860 EVO SSD. I'm looking at using Solaris for this server (so looking at whether doing this with ZFS is possible). Is it possible to mirror the 250GB ...
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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 ...
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1answer
924 views

Does Dell PowerEdge R720(xd) support PCIe Bifurcation?

I want to add a bunch of SSDs to my PowerEdge R720xd, and the highest-density way to do that seems to be a card like this Dell Ultra-Speed Drive Quad NVMe M.2 PCIe x16 Card. However, the specs on ...
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1answer
611 views

What is the cause of most top-vendor SSD crashes?

I'm referring to total crashes where the SSD doesn't work anymore. Not IO errors. SSDs have a limited lifespan. So if nothing else goes wrong, eventually they die of NAND wear. My question is what ...
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Wear levelling score on smartctl does not match TBW claim

I have a small secondary Toshiba RC100 SSD with specified endurance of 120 TB. smartctl reports data units written of about 3% of that. But the wear levelling count(or "Percentage used") reports at ...
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1answer
649 views

HP Proliant DL360 G9 with Samsung 983 DCT

I have a HP Proliant DL360 G9 (with P440ar storage controller). I would like to know whether it is possible to connect NVMe U.2 SSD? The SSD I was thinking about is Samsung 983 DCT. I'm not sure how ...
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1answer
148 views

MEGARAID RAID 1 SSD WITH HOT SPARE AVAILABLE

I do not know whether this requires immediate action or not. W2012R2 server with two 500GB SSDs plus one identical Hot Global Spare. RAID is Megaraid. Screenshots from the RAID Utility are attached ...
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1answer
259 views

Best Practices for Deploying Microsoft SQL Server on AWS on EC2 instance with SSD storage

Does it makes sense to install SQL Server 2017 on one single SSD drive on m5.xlarge with tempdbs, databases, program files, backups and logs for best performance? According to Amazon EBS specs the ...
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4k views

Linux SSD as HDD cache

I have a Linux server system installed on a SSD and a 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-...
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3answers
716 views

Slow Single Thread Performance on Dell R620 and Windows Server 2019

I recently purchased some new to me r620 servers for a cluster. Mostly they will be doing heavy database transactions, but generally they will have Hyper-V vms doing a variety of work. It was during ...
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1answer
327 views

HP DL360 G7 Smart Array P410i drive mix [closed]

i have HP DL360 G7 Smart Array P410i with 3xSAS HDD 146 GB in RAID5. I decided to change hard drives to SSD ones (3x180 Intel SSD). My idea was to change drives one by one and wait for RAID rebuilds. ...
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2answers
65 views

Can faulty SSD result in server restart?

One of our servers faced random time restarts, we asked the dc to run hardware test and they said one of the SSD are likely failed. Could it be the reason for restarts in random times? We have ...
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1answer
84 views

Does issuing a sync call flush an SSD's write cache?

Suppose I create a number of directories on SSD, then issue a "sync" call. The sync call will guarantee that any writes, even if they are stored in the write cache, will be flushed to disk by the ...
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2answers
351 views

Hardware RAID array using PCIe based storage? (M.2 / U.2 / full PCIe slot)

Is there currently a mechanism for constructing a hardware RAID array using storage devices that have a full-size PCIe slot, PCIe M.2, or PCIe U.2 bus interface, such as SSDs? It is extremely ...
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664 views

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" ...

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