add a few hardware notes

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+# Personal FSF Sysadmin related notes and todos

diff --git a/work.org b/work.org
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--- a/work.org
+++ b/work.org
@@ -4,8 +4,93 @@ https://savannah.gnu.org/maintenance/fsf/ .  Some things here will end
 up there after someone edits them for the benefit of readers besides me
 (Ian Kelling).
 
-* todo
-spd crypt-luks-keys-loopback luks pass should say partition
+* ssd model notes 2024-08
+
+
+solidigm (was intel)
+4t D3-S4520: 91/31 3dpwd
+2t D3-S4520: 91/38 3dpwd
+1t D3-S4520: 91/43 3dpwd
+
+1t D3-S4610: 96/51 3.3dpwd
+2t D3-S4610: 96/46 3.3dpwd
+4t D3-S4610: 96/42 3.3dpwd
+
+1t D3-S4620: 90/54 4.3dpwd
+
+intel:
+1t   DC S3710: 84/45 10dwpd
+1.5t DC S3610: 84/28 3dwpd
+1-2t DC s4510: 97/36 2dwpd
+1-2t DC s4610: 97/51 3dwpd
+1-8t D3-S4610: 97/42 3dwpd
+1-8t D3-S4510: 97/35 6.5pbw (prolly 3dwpd)
+1-2t DC s4500: 72/33 3dwpd
+1-2t DC s4600: 74/65 3dwpd
+
+micron
+5400 95/65
+ pro 960gb: 6dwpd (scales with capacity)
+ max 960gb: 13.6 (scales w capacity)
+
+seagate ironwolf
+1-4t ironwolf 125: 95/90  .75dwpd
+1-4t ironwolf 110: 84/45  1dwpd
+1-4t firecuda 120: 100/90 1dwpd
+1-4t nytro 1361: 94/68 1dwpd
+(sas nytros have high specs)
+1-2t barracuda 120: 90/90  .7dwpd
+
+crucial
+1-4tb mx500 95/90: .5dwpd
+
+synology
+SAT5220-1920G /SAT5220-3840G  98/60 1dwpd
+https://www.synology.com/en-global/products/drives/ssd/enterprise-sat#specs
+
+
+prices
+
+micron 5400 pro https://www.newegg.com/p/2U3-000U-00067
+ 3.84tb $203/tb
+
+ironwolf 125
+ 4tb $94/tb
+
+mx500:
+  2tb $79/tb
+  4tb $72/tb
+
+s4510
+  .96tb $197 newegg
+  3.84tb $127
+  https://www.neweggbusiness.com/product/product.aspx?item=9siv05zhag8836
+
+solidigm
+S4520
+  1.92tb $128 ($244)
+https://www.newegg.com/intel-1-92tb/p/0D9-002V-00AB2?Item=9SIA12KJCU2951
+  7.86tb $113
+
+
+* TODO get download1 crypt pass into spd
+and look for other hosts missing crypt passes
+
+
+
+* d16 bandwidth theoretical limits
+
+500MB/s ssd = 4 Gb/s
+
+LSI 9207-8i, max 6Gb/s per cable
+
+PCIE gen 2 8x = max 32Gb/s, so about 7 ssds
+
+max d16 pcie slots:
+
+1 x4, 2x8, 1x16
+
+* TODO
 
 document the process of being an outbound relay for sourceware