PHYがSASアダプタでRate Unknownを報告する

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環境

ONTAP 9
FASシステム
AFFシステム

問題

PHYがSASアダプタでRate Unknownを報告する：

slot 0: SAS Host Adapter 0a (PMC-Sierra PM8072 rev. C, SAS, <UP>) Firmware rev: 03.08.09.00 Base WWN: 5:00a098:003b627:a0 Phy State: [12] Enabled, Rate unknown [13] Enabled, 12.0 Gb/s [14] Enabled, 12.0 Gb/s [15] Enabled, 12.0 Gb/s Mini-SAS HD Vendor: MOLEX

slot 0: SAS Host Adapter 0b (PMC-Sierra PM8072 rev. C, SAS, <UP>) Firmware rev: 03.08.09.00 Base WWN: 5:00a098:003b3f3:74 Phy State: [8] Enabled, 12.0 Gb/s [9] Enabled, 12.0 Gb/s [10] Disabled [11] Disabled Mini-SAS HD Vendor: MOLEX

sas-expander-phy-stateログにRate unknownと表示される。

SAS-EXPANDER-PHY-STATE Expander phy state on 0b.10 (NETAPP :DS22412IOM12A SHFNC2024000199): Pwr Invald Disprt Loss Phy CRC Phy Pwr Ccl Rsv Rls DWord Error Sync Reset Error Change SATA PHY/BAY STATE ON Cnt Cnt Cnt Count Count Count Prob Cnt Cnt Affiliation ------- ----------------- --- --- --- --- ------ ------ ------ ------ ------ ------ ---------------- 0/P0:0 12.0 Gb/s --- --- --- --- 0 0 0 0 0 3 ---------------- 1/P0:1 12.0 Gb/s --- --- --- --- 0 0 0 0 0 3 ---------------- 2/P0:2 12.0 Gb/s --- --- --- --- 0 0 0 0 0 3 ---------------- 3/P0:3 12.0 Gb/s --- --- --- --- 0 0 0 0 0 3 ---------------- 8/P2:0 Rate unknown 9/P2:1 Rate unknown

sas-adapter-stateログがdegradedと表示される

SAS-ADAPTER-STATE State for adapter channel 0b: UP (degraded) Invald Disprt Loss Phy Phy DWord Error Sync Reset Change PHY STATE Count Count Count Prob Count -------------------------------------------------------- 8 12.0 Gb/s 0 0 0 0 11 9 12.0 Gb/s 0 0 0 0 11 10 Disabled 0 0 0 0 12 11 Disabled 0 0 0 0 12

EMSログ：

[sas.cable.degraded:error]: Cable attached to SAS port "1d" is functioning in a degraded mode.