https://wiki.geekworm.com/index.php?action=history&feed=atom&title=CommentStreams%3AF8c4ec1f6e3c1339100a5834507baa5e 2026-07-26T00:11:18Z Revision history for this page on the wiki MediaWiki 1.43.8 https://wiki.geekworm.com/index.php?title=CommentStreams:F8c4ec1f6e3c1339100a5834507baa5e&diff=34630&oldid=prev 2024-10-19T04:46:27Z

<p>Migrated comment #5223</p> <p><b>New page</b></p><div>In case someone battling making NAS with large NVMEs... I&#039;m almost 100% sure that 1A@5V(5.00W) is not enough for powering them. Example below is from 4x(Shenzhen Longsys Electronics Co., Ltd. Lexar NM790 NVME SSD (DRAM-less) (rev 01)).<br /> <br /> ```<br /> # smartctl -c /dev/nvme0<br /> smartctl 7.4 2023-08-01 r5530 [aarch64-linux-6.11.0-1004-raspi] (local build)<br /> Copyright (C) 2002-23, Bruce Allen, Christian Franke, www.smartmontools.org<br /> <br /> === START OF INFORMATION SECTION ===<br /> Firmware Updates (0x14): 2 Slots, no Reset required<br /> Optional Admin Commands (0x0017): Security Format Frmw_DL Self_Test<br /> Optional NVM Commands (0x005f): Comp Wr_Unc DS_Mngmt Wr_Zero Sav/Sel_Feat Timestmp<br /> Log Page Attributes (0x0e): Cmd_Eff_Lg Ext_Get_Lg Telmtry_Lg<br /> Maximum Data Transfer Size: 128 Pages<br /> Warning Comp. Temp. Threshold: 90 Celsius<br /> Critical Comp. Temp. Threshold: 95 Celsius<br /> <br /> Supported Power States<br /> St Op Max Active Idle RL RT WL WT Ent_Lat Ex_Lat<br /> 0 + 6.50W - - 0 0 0 0 0 0<br /> 1 + 5.80W - - 1 1 1 1 0 0<br /> 2 + 3.60W - - 2 2 2 2 0 0<br /> 3 - 0.0500W - - 3 3 3 3 5000 10000<br /> 4 - 0.0025W - - 4 4 4 4 8000 41000<br /> <br /> Supported LBA Sizes (NSID 0x1)<br /> Id Fmt Data Metadt Rel_Perf<br /> 0 + 512 0 0<br /> ```<br /> <br /> After 2 days battling this is a `partial` workaroung I found working almost stable using RaidZ1(in RaidZ2 setup NAS still hangs after seconds when loaded).<br /> <br /> With this command you are saying NVME drive to use power modes &lt;=2.<br /> ```<br /> nvme set-feature /dev/nvme0 --feature-id=2 --value=2<br /> ```<br /> <br /> You can check current power mode starus like this. <br /> ```<br /> nvme get-feature /dev/nvme0 -f 2 <br /> get-feature:0x02 (Power Management), Current value:0x00000004<br /> ```<br /> <br /> More info when available.&lt;!-- migrated from Comments; original IP: 78.90.162.24 --&gt;</div>

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