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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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What are the differences between consumer grade SSDs and the much more expensive enterprise SSDs?

I am in need of a terabyte or so of storage space for Lucene indices on a testing server. I'm having a hard time differentiating between disks like the Samsung 840 evo for about $450 vs SSDs with similar capacities that cost many thousands of…
balazs
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NVMe driver for Illumos: can it be considered usable?

Can the NVM Express (NVMe) driver driver-storage-nvme for Illumos be considered usable? It would be nice to use e.g. an Intel DC P3700 PCIe drive for L2ARC as the SAS2 and 3 SSD drives are awfully scarce/expensive at the end of the Channel available…
jpe
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HP P420i SSD RAID Configuration

I've been testing a HP DL380p with 16x SSDs in a RAID5 on the P420i controller with 2GB FBWC that is integrated on the board. Quite good performance, but not good enough. When I simulate the IO footprint I expect on ESXi, the Average Device Latency…
AndersN
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ncq not supported on an SATA3.0 HDD in an usb 3.0 casing

is there a well known reason why a SATA3.0 HDD supporting NCQ does not have NCQ queue depth configured when mounted from an usb 3.0 case ? output for hdparm -iI /dev/sda shows NCQ is supported output for cat /sys/block/sda/device/queue_depth …
Saint Crusty
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Set Windows pagefile size in answer file?

Is it possible to set the Windows pagefile size in an answer file? The Windows Automated Installation Kit (WAIK) Unattended Windows Setup Reference shows that the pagefile for the windowsPE pass of setup can be set, but that this setting does not…
sejong
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HP SSD on ProLiant DL360p Gen8 p420i controller - no TRIM?

We have a HP Proliant Dl360 Gen8 server with the 420i 2Gg disk controller. (646905-421) we have a couple of the HP Gen8 200GB 6G SAS SLC SSDs (653078-B21), (they run in RAID1) We run Debian6 on this server, and HP says that the "trim" command is not…
Sverre
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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 # echo 'DEVICE /dev/xvdf /dev/xvdg' > /etc/mdadm.conf #…
BraveHeart
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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 production-ready status, but I also want to use ZIL and…
Alexander
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FreeBSD 9.2 shows SATA3 drives as SATA2

I'm running FreeBSD 9.2 on an Intel S2600GZ server board with 4 Intel SSDs. Both the server board as well as the disks are SATA3 capable. However, FreeBSD seems to think they are SATA2. Nowhere in system configuration are the disks limited to SATA2.…
pilsetnieks
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flashcache with mdadm and LVM

I am having trouble setting up flashcache on a system with LVM and mdadm, I suspect I am either just missing an obvious step or getting some mapping wrong and hoped someone could point me in the right direction? system info: CentOS 6.4 64 bit mdadm…
Backtogeek
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Is file system alignment required on hardware-raid with SSDs?

We are building a raid-10 with LSI 9260-4i + 4 x Intel DC S3500 SDDs. Partition alignment From what I understand I need to start fdisk with -H32 -S32 or Ted T'so variant with -H224 -S56 in order to align the partitions to 512k and 128k…
Andy B
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SSDs, Hardware RAID, and TRIM

I was told by my datacenter that all HW raid, specifically the LSI 9260-4i hardware RAID controller, does not support SSD TRIM command. My question is, are there severe longevity/speed issues due to this? My datacenter said I would be better off…
user3180
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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 LVM snapshots to save the VM states after each…
user160910
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Should I enable "Patrol Read" on SSD drives?

LSI, Intel and Dell RAID controllers (perhaps others) have a "Patrol Read" feature to try to spot when a drive is failing before it completely fails. LSI seems to disable patrol read on SSD by default but allows you to turn it on if desired via…
ck_
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Are there any SAN vendors that allow third party drives?

I'm trying to convert our SaaS platform to SSDs for performance reasons, and wanted to use the new Intel DC3500. But our Dell SAN only accepts authorized Dell drives, and their only options are eMLC and cost 5x as much. Our workload is primarily…
Josh Yeager
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