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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">Yes, this issue has been lurking around since they made the arcs compressible. I really wish they would revert that change. There have been at least 3 illumos
issues filed for this and two fixes attempted. So far it still persist. For now I have my cache drives removed from my production pools.<o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:windowtext"> OmniOS-discuss [mailto:omnios-discuss-bounces@lists.omniti.com]
<b>On Behalf Of </b>Richard Skelton<br>
<b>Sent:</b> Friday, September 1, 2017 6:04 PM<br>
<b>To:</b> omniOS-discuss <omnios-discuss@lists.omniti.com><br>
<b>Subject:</b> [OmniOS-discuss] ZFS cache device allocation a free seem strange on my OmniOS r151022 system.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal" style="margin-bottom:12.0pt"><tt><span style="font-size:10.0pt">Hi,</span></tt><span style="font-size:10.0pt;font-family:"Courier New""><br>
<tt>The cache allocation a free seem strange on my OmniOS r151022 system.</tt><br>
<tt>The cache device is an Intel SSD DC P3700 Series 800GB, 1/2 Height PCIe 3.0, 20nm, MLC</tt><br>
<tt>root@omnios:/scratch# zpool list -v scratch</tt><br>
<tt>NAME SIZE ALLOC FREE EXPANDSZ FRAG CAP DEDUP HEALTH ALTROOT</tt><br>
<tt>scratch 2.66T 1.94T 738G - 17% 72% 1.00x ONLINE -</tt><br>
<tt> mirror 544G 395G 149G - 16% 72%</tt><br>
<tt> c7t5000CCA018309809d0 - - - - - -</tt><br>
<tt> c18t5000CCA038718395d0 - - - - - -</tt><br>
<tt> mirror 544G 396G 148G - 15% 72%</tt><br>
<tt> c14t5000CCA038710745d0 - - - - - -</tt><br>
<tt> c11t5000CCA038721F5Dd0 - - - - - -</tt><br>
<tt> mirror 544G 396G 148G - 18% 72%</tt><br>
<tt> c12t5000CCA03871048Dd0 - - - - - -</tt><br>
<tt> c13t5000CCA0387102E1d0 - - - - - -</tt><br>
<tt> mirror 544G 398G 146G - 19% 73%</tt><br>
<tt> c15t5000CCA03871058Dd0 - - - - - -</tt><br>
<tt> c16t5000CCA0387224EDd0 - - - - - -</tt><br>
<tt> mirror 544G 396G 148G - 17% 72%</tt><br>
<tt> c17t5000CCA038717F65d0 - - - - - -</tt><br>
<tt> c10t5000CCA038717AC9d0 - - - - - -</tt><br>
<tt>log - - - - - -</tt><br>
<tt> c6t0d0 3.84G 0 3.84G - 0% 0%</tt><br>
<tt>cache - - - - - -</tt><br>
<tt> c3t1d0 745G <b>1.07T 16.0E - 0% 147%</b></tt><br>
<tt>spare - - - - - -</tt><br>
<tt> c9t5000CCA038717B2Dd0 - - - - - -</tt><br>
<tt> c8t5000CCA0387104B1d0 - - - - - -</tt><br>
<tt>root@omnios:/scratch# format </dev/null</tt><br>
<tt>Searching for disks...done</tt><br>
<br>
<br>
<tt>AVAILABLE DISK SELECTIONS:</tt><br>
<tt> 0. c2t4d0 <Samsung-SSD 850 PRO 256GB-EXM02B6Q-238.47GB></tt><br>
<tt> /pci@0,0/pci8086,35c5@1f,2/disk@4,0</tt><br>
<tt> 1. c2t5d0 <Samsung-SSD 850 PRO 256GB-EXM02B6Q-238.47GB></tt><br>
<tt> /pci@0,0/pci8086,35c5@1f,2/disk@5,0</tt><br>
<tt> 2. c3t1d0 <INTEL-SSDPEDMD800G4-8DV10171-745.21GB></tt><br>
<tt> /pci@75,0/pci8086,6f0a@3,2/pci8086,3702@0/blkdev@1,0</tt><br>
<tt> 3. c6t0d0 <DDRDRIVE-X1-0078-3.87GB></tt><br>
<tt> /pci@75,0/pci8086,6f06@2,2/pci19e3,81@0/sd@0,0</tt><br>
<br>
<br>
<tt>Cheers</tt><br>
<tt>Richard</tt></span><o:p></o:p></p>
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