Lukewarm: eBay: 1TB SSD Intel DC P4500 SSD NVMe PCIe U.2 with ePLP $119 + free ship

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Bert

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Is StorageSpace smart enough to take advantage of PLP in SSD? For this to work, software has to know how to safely transfer data from cache to disk and that's not straightforward.
 

Philmatic

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Mithril

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Looks like it comes in a dell caddy as well, are they cross compatible (assuming the backplane supports U.2)?
 
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Samir

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Can you use this for booting with an adapter like this one from startech?
U.2 to PCIe Adapter for 2.5

According to startech this doesn't require any drivers, but I know nvme booting does require bios support in many cases.
 

sd11

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Write speed is slow for this drive. Isn't that what you don't want for a cache drive?
 
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Philmatic

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Can you use this for booting with an adapter like this one from startech?
U.2 to PCIe Adapter for 2.5

According to startech this doesn't require any drivers, but I know nvme booting does require bios support in many cases.
Yeah, this wouldn’t change the capabilities of NVMe booting, which as you already noted is determined by the BIOS. Generally speaking, you need you need a hacked BIOS (Good luck) or a more recent motherboard than the v1/v2 Xeons. It doesn’t matter if NVMe is cabled (U.2) or slotted (M.2 or PCIe), booting is the same.

Write speed is slow for this drive. Isn't that what you don't want for a cache drive?
It’s not fast enough for wire speed at 10gbps, yes. But if you have a gigabit network (Or multi-gigabit up to 5gbps), or otherwise need faster local access (VMs, etc) this is more than enough.
 
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Samir

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Yeah, this wouldn’t change the capabilities of NVMe booting, which as you already noted is determined by the BIOS. Generally speaking, you need you need a hacked BIOS (Good luck) or a more recent motherboard than the v1/v2 Xeons. It doesn’t matter if NVMe is cabled (U.2) or slotted (M.2 or PCIe), booting is the same.
Thank you for the clear and detailed reply! :)
 

Philmatic

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fake-name

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I'm not sure why you'd go for these when the P4510 is only $10 more: Intel DC P4510 Series 1TB Internal 2.5" NVMe PCIe SSD SSDPE2KX010T8 | eBay

7X the write endurance and 3X the write IOPS.

Only downside is you don't get the caddie, which is only a problem if you want the caddie.
So I bought two of these and they showed up today.

Code:
durr@baknas:~$ sudo smartctl -a /dev/nvme0
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.15.0-72-generic] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number:                       INTEL SSDPE2KX010T8
Serial Number:                      {snip}
Firmware Version:                   VDV10131
PCI Vendor/Subsystem ID:            0x8086
IEEE OUI Identifier:                0x5cd2e4
Total NVM Capacity:                 1,000,204,886,016 [1.00 TB]
Unallocated NVM Capacity:           0
Controller ID:                      0
Number of Namespaces:               1
Namespace 1 Size/Capacity:          1,000,204,886,016 [1.00 TB]
Namespace 1 Formatted LBA Size:     512
Local Time is:                      Mon Dec 16 23:53:55 2019 PST
Firmware Updates (0x02):            1 Slot
Optional Admin Commands (0x000e):   Format Frmw_DL NS_Mngmt
Optional NVM Commands (0x0006):     Wr_Unc DS_Mngmt
Maximum Data Transfer Size:         32 Pages
Warning  Comp. Temp. Threshold:     70 Celsius
Critical Comp. Temp. Threshold:     80 Celsius

Supported Power States
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
 0 +    25.00W       -        -    0  0  0  0        0       0

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
 0 +     512       0         2
 1 -    4096       0         0


=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning:                   0x00
Temperature:                        44 Celsius
Available Spare:                    100%
Available Spare Threshold:          10%
Percentage Used:                    0%
Data Units Read:                    1,515,656 [776 GB]
Data Units Written:                 2,097,129 [1.07 TB]
Host Read Commands:                 183,668,231
Host Write Commands:                187,926,688
Controller Busy Time:               10
Power Cycles:                       18
Power On Hours:                     42
Unsafe Shutdowns:                   15
Media and Data Integrity Errors:    0
Error Information Log Entries:      0
Warning  Comp. Temperature Time:    0
Critical Comp. Temperature Time:    0

Error Information (NVMe Log 0x01, max 64 entries)
No Errors Logged

durr@baknas:~$ sudo smartctl -a /dev/nvme1
smartctl 6.6 2016-05-31 r4324 [x86_64-linux-4.15.0-72-generic] (local build)
Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

=== START OF INFORMATION SECTION ===
Model Number:                       INTEL SSDPE2KX010T8
Serial Number:                      {snip}
Firmware Version:                   VDV10131
PCI Vendor/Subsystem ID:            0x8086
IEEE OUI Identifier:                0x5cd2e4
Total NVM Capacity:                 1,000,204,886,016 [1.00 TB]
Unallocated NVM Capacity:           0
Controller ID:                      0
Number of Namespaces:               1
Namespace 1 Size/Capacity:          1,000,204,886,016 [1.00 TB]
Namespace 1 Formatted LBA Size:     512
Local Time is:                      Mon Dec 16 23:54:07 2019 PST
Firmware Updates (0x02):            1 Slot
Optional Admin Commands (0x000e):   Format Frmw_DL NS_Mngmt
Optional NVM Commands (0x0006):     Wr_Unc DS_Mngmt
Maximum Data Transfer Size:         32 Pages
Warning  Comp. Temp. Threshold:     70 Celsius
Critical Comp. Temp. Threshold:     80 Celsius

Supported Power States
St Op     Max   Active     Idle   RL RT WL WT  Ent_Lat  Ex_Lat
 0 +    25.00W       -        -    0  0  0  0        0       0

Supported LBA Sizes (NSID 0x1)
Id Fmt  Data  Metadt  Rel_Perf
 0 +     512       0         2
 1 -    4096       0         0

=== START OF SMART DATA SECTION ===
SMART overall-health self-assessment test result: PASSED

SMART/Health Information (NVMe Log 0x02, NSID 0xffffffff)
Critical Warning:                   0x00
Temperature:                        43 Celsius
Available Spare:                    100%
Available Spare Threshold:          10%
Percentage Used:                    0%
Data Units Read:                    1,488,085 [761 GB]
Data Units Written:                 2,139,668 [1.09 TB]
Host Read Commands:                 183,315,907
Host Write Commands:                188,138,288
Controller Busy Time:               11
Power Cycles:                       18
Power On Hours:                     42
Unsafe Shutdowns:                   15
Media and Data Integrity Errors:    0
Error Information Log Entries:      0
Warning  Comp. Temperature Time:    0
Critical Comp. Temperature Time:    0

Error Information (NVMe Log 0x01, max 64 entries)
No Errors Logged
100% life on both of them, with ~750GB reads/writes for each (I'm doing a badblocks run, which is why it's now higher).

42 power-on hours, with 18 power cycles, 15 of which were unsafe!

Anyways, they seem basically brand new.
 
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